Full dependency reboot

Reinstall everything from a clean node_modules and package-lock.json
state.

Re-generate list of bundleDependencies and node_modules/.gitignore with
a script that does the right thing based on actual dependency state.

18 files changed, 778 insertions, 551 deletions

diff --git a/node_modules/iconv-lite/.github/dependabot.yml b/node_modules/iconv-lite/.github/dependabot.yml
new file mode 100644
index 000000000..e4a0e0afd
--- /dev/null
+++ b/node_modules/iconv-lite/.github/dependabot.yml
@@ -0,0 +1,11 @@
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    allow:
+      - dependency-type: production
diff --git a/node_modules/iconv-lite/.travis.yml b/node_modules/iconv-lite/.travis.yml
deleted file mode 100644
index 3eab7fdb3..000000000
--- a/node_modules/iconv-lite/.travis.yml
+++ /dev/null
@@ -1,23 +0,0 @@
- sudo: false
- language: node_js
- node_js:
-   - "0.10"
-   - "0.11"
-   - "0.12"
-   - "iojs"
-   - "4"
-   - "6"
-   - "8"
-   - "node"
-
-
- env:
-   - CXX=g++-4.8
- addons:
-   apt:
-     sources:
-       - ubuntu-toolchain-r-test
-     packages:
-       - gcc-4.8
-       - g++-4.8
-
diff --git a/node_modules/iconv-lite/Changelog.md b/node_modules/iconv-lite/Changelog.md
index e31cd0c24..c299cc06a 100644
--- a/node_modules/iconv-lite/Changelog.md
+++ b/node_modules/iconv-lite/Changelog.md
@@ -1,46 +1,96 @@
+## 0.6.2 / 2020-07-08
+  * Support Uint8Array-s decoding without conversion to Buffers, plus fix an edge case.
 
-# 0.4.23 / 2018-05-07
+
+## 0.6.1 / 2020-06-28
+  * Support Uint8Array-s directly when decoding (#246, by @gyzerok)
+  * Unify package.json version ranges to be strictly semver-compatible (#241)
+  * Fix minor issue in UTF-32 decoder's endianness detection code.
+
+
+## 0.6.0 / 2020-06-08
+  * Updated 'gb18030' encoding to :2005 edition (see https://github.com/whatwg/encoding/issues/22).
+  * Removed `iconv.extendNodeEncodings()` mechanism. It was deprecated 5 years ago and didn't work 
+    in recent Node versions.
+  * Reworked Streaming API behavior in browser environments to fix #204. Streaming API will be 
+    excluded by default in browser packs, saving ~100Kb bundle size, unless enabled explicitly using 
+    `iconv.enableStreamingAPI(require('stream'))`.
+  * Updates to development environment & tests:
+    * Added ./test/webpack private package to test complex new use cases that need custom environment. 
+      It's tested as a separate job in Travis CI.
+    * Updated generation code for the new EUC-KR index file format from Encoding Standard.
+    * Removed Buffer() constructor in tests (#197 by @gabrielschulhof).
+
+
+## 0.5.2 / 2020-06-08
+  * Added `iconv.getEncoder()` and `iconv.getDecoder()` methods to typescript definitions (#229).
+  * Fixed semver version to 6.1.2 to support Node 8.x (by @tanandara).
+  * Capped iconv version to 2.x as 3.x has dropped support for older Node versions.
+  * Switched from instanbul to c8 for code coverage.
+
+
+## 0.5.1 / 2020-01-18
+
+  * Added cp720 encoding (#221, by @kr-deps)
+  * (minor) Changed Changelog.md formatting to use h2. 
+
+
+## 0.5.0 / 2019-06-26
+
+  * Added UTF-32 encoding, both little-endian and big-endian variants (UTF-32LE, UTF32-BE). If endianness
+    is not provided for decoding, it's deduced automatically from the stream using a heuristic similar to
+    what we use in UTF-16. (great work in #216 by @kshetline)
+  * Several minor updates to README (#217 by @oldj, plus some more)
+  * Added Node versions 10 and 12 to Travis test harness.
+
+
+## 0.4.24 / 2018-08-22
+
+  * Added MIK encoding (#196, by @Ivan-Kalatchev)
+
+
+## 0.4.23 / 2018-05-07
 
   * Fix deprecation warning in Node v10 due to the last usage of `new Buffer` (#185, by @felixbuenemann)
   * Switched from NodeBuffer to Buffer in typings (#155 by @felixfbecker, #186 by @larssn)
 
 
-# 0.4.22 / 2018-05-05
+## 0.4.22 / 2018-05-05
 
   * Use older semver style for dependencies to be compatible with Node version 0.10 (#182, by @dougwilson)
   * Fix tests to accomodate fixes in Node v10 (#182, by @dougwilson)
 
 
-# 0.4.21 / 2018-04-06
+## 0.4.21 / 2018-04-06
 
   * Fix encoding canonicalization (#156)
   * Fix the paths in the "browser" field in package.json (#174 by @LMLB)
   * Removed "contributors" section in package.json - see Git history instead.
 
 
-# 0.4.20 / 2018-04-06
+## 0.4.20 / 2018-04-06
 
   * Updated `new Buffer()` usages with recommended replacements as it's being deprecated in Node v10 (#176, #178 by @ChALkeR)
 
 
-# 0.4.19 / 2017-09-09
+## 0.4.19 / 2017-09-09
 
   * Fixed iso8859-1 codec regression in handling untranslatable characters (#162, caused by #147)
   * Re-generated windows1255 codec, because it was updated in iconv project
   * Fixed grammar in error message when iconv-lite is loaded with encoding other than utf8
 
 
-# 0.4.18 / 2017-06-13
+## 0.4.18 / 2017-06-13
 
   * Fixed CESU-8 regression in Node v8.
 
 
-# 0.4.17 / 2017-04-22
+## 0.4.17 / 2017-04-22
 
  * Updated typescript definition file to support Angular 2 AoT mode (#153 by @larssn)
 
 
-# 0.4.16 / 2017-04-22
+## 0.4.16 / 2017-04-22
 
  * Added support for React Native (#150)
  * Changed iso8859-1 encoding to usine internal 'binary' encoding, as it's the same thing (#147 by @mscdex)
@@ -49,12 +99,12 @@
  * Added a warning if iconv-lite is loaded not as utf-8 (see #142)
 
 
-# 0.4.15 / 2016-11-21
+## 0.4.15 / 2016-11-21
 
  * Fixed typescript type definition (#137)
 
 
-# 0.4.14 / 2016-11-20
+## 0.4.14 / 2016-11-20
 
  * Preparation for v1.0
  * Added Node v6 and latest Node versions to Travis CI test rig
@@ -64,12 +114,12 @@
  * Add ms prefix to dbcs windows encodings (@rokoroku)
 
 
-# 0.4.13 / 2015-10-01
+## 0.4.13 / 2015-10-01
 
  * Fix silly mistake in deprecation notice.
 
 
-# 0.4.12 / 2015-09-26
+## 0.4.12 / 2015-09-26
 
  * Node v4 support:
    * Added CESU-8 decoding (#106)
@@ -77,18 +127,18 @@
    * Added Travis tests for Node v4 and io.js latest (#105 by @Mithgol)
 
 
-# 0.4.11 / 2015-07-03
+## 0.4.11 / 2015-07-03
 
  * Added CESU-8 encoding.
 
 
-# 0.4.10 / 2015-05-26
+## 0.4.10 / 2015-05-26
 
  * Changed UTF-16 endianness heuristic to take into account any ASCII chars, not
    just spaces. This should minimize the importance of "default" endianness.
 
 
-# 0.4.9 / 2015-05-24
+## 0.4.9 / 2015-05-24
 
  * Streamlined BOM handling: strip BOM by default, add BOM when encoding if 
    addBOM: true. Added docs to Readme.
@@ -100,12 +150,12 @@
  * Use strict mode in all files.
 
 
-# 0.4.8 / 2015-04-14
+## 0.4.8 / 2015-04-14
  
  * added alias UNICODE-1-1-UTF-7 for UTF-7 encoding (#94)
 
 
-# 0.4.7 / 2015-02-05
+## 0.4.7 / 2015-02-05
 
  * stop official support of Node.js v0.8. Should still work, but no guarantees.
    reason: Packages needed for testing are hard to get on Travis CI.
@@ -113,40 +163,40 @@
    props (#89).
 
 
-# 0.4.6 / 2015-01-12
+## 0.4.6 / 2015-01-12
  
  * fix rare aliases of single-byte encodings (thanks @mscdex)
  * double the timeout for dbcs tests to make them less flaky on travis
 
 
-# 0.4.5 / 2014-11-20
+## 0.4.5 / 2014-11-20
 
  * fix windows-31j and x-sjis encoding support (@nleush)
  * minor fix: undefined variable reference when internal error happens
 
 
-# 0.4.4 / 2014-07-16
+## 0.4.4 / 2014-07-16
 
  * added encodings UTF-7 (RFC2152) and UTF-7-IMAP (RFC3501 Section 5.1.3)
  * fixed streaming base64 encoding
 
 
-# 0.4.3 / 2014-06-14
+## 0.4.3 / 2014-06-14
 
  * added encodings UTF-16BE and UTF-16 with BOM
 
 
-# 0.4.2 / 2014-06-12
+## 0.4.2 / 2014-06-12
 
  * don't throw exception if `extendNodeEncodings()` is called more than once
 
 
-# 0.4.1 / 2014-06-11
+## 0.4.1 / 2014-06-11
 
  * codepage 808 added
 
 
-# 0.4.0 / 2014-06-10
+## 0.4.0 / 2014-06-10
 
  * code is rewritten from scratch
  * all widespread encodings are supported
diff --git a/node_modules/iconv-lite/README.md b/node_modules/iconv-lite/README.md
index c981c3708..3c97f8730 100644
--- a/node_modules/iconv-lite/README.md
+++ b/node_modules/iconv-lite/README.md
@@ -1,38 +1,40 @@
-## Pure JS character encoding conversion [![Build Status](https://travis-ci.org/ashtuchkin/iconv-lite.svg?branch=master)](https://travis-ci.org/ashtuchkin/iconv-lite)
+## iconv-lite: Pure JS character encoding conversion
 
- * Doesn't need native code compilation. Works on Windows and in sandboxed environments like [Cloud9](http://c9.io).
+ * No need for native code compilation. Quick to install, works on Windows and in sandboxed environments like [Cloud9](http://c9.io).
  * Used in popular projects like [Express.js (body_parser)](https://github.com/expressjs/body-parser), 
    [Grunt](http://gruntjs.com/), [Nodemailer](http://www.nodemailer.com/), [Yeoman](http://yeoman.io/) and others.
  * Faster than [node-iconv](https://github.com/bnoordhuis/node-iconv) (see below for performance comparison).
- * Intuitive encode/decode API
- * Streaming support for Node v0.10+
- * [Deprecated] Can extend Node.js primitives (buffers, streams) to support all iconv-lite encodings.
- * In-browser usage via [Browserify](https://github.com/substack/node-browserify) (~180k gzip compressed with Buffer shim included).
+ * Intuitive encode/decode API, including Streaming support.
+ * In-browser usage via [browserify](https://github.com/substack/node-browserify) or [webpack](https://webpack.js.org/) (~180kb gzip compressed with Buffer shim included).
  * Typescript [type definition file](https://github.com/ashtuchkin/iconv-lite/blob/master/lib/index.d.ts) included.
- * React Native is supported (need to explicitly `npm install` two more modules: `buffer` and `stream`).
+ * React Native is supported (need to install `stream` module to enable Streaming API).
  * License: MIT.
 
-[![NPM Stats](https://nodei.co/npm/iconv-lite.png?downloads=true&downloadRank=true)](https://npmjs.org/packages/iconv-lite/)
+[![NPM Stats](https://nodei.co/npm/iconv-lite.png)](https://npmjs.org/package/iconv-lite/)  
+[![Build Status](https://travis-ci.org/ashtuchkin/iconv-lite.svg?branch=master)](https://travis-ci.org/ashtuchkin/iconv-lite)
+[![npm](https://img.shields.io/npm/v/iconv-lite.svg)](https://npmjs.org/package/iconv-lite/)
+[![npm downloads](https://img.shields.io/npm/dm/iconv-lite.svg)](https://npmjs.org/package/iconv-lite/)
+[![npm bundle size](https://img.shields.io/bundlephobia/min/iconv-lite.svg)](https://npmjs.org/package/iconv-lite/)
 
 ## Usage
 ### Basic API
 ```javascript
 var iconv = require('iconv-lite');
 
-// Convert from an encoded buffer to js string.
+// Convert from an encoded buffer to a js string.
 str = iconv.decode(Buffer.from([0x68, 0x65, 0x6c, 0x6c, 0x6f]), 'win1251');
 
-// Convert from js string to an encoded buffer.
+// Convert from a js string to an encoded buffer.
 buf = iconv.encode("Sample input string", 'win1251');
 
 // Check if encoding is supported
 iconv.encodingExists("us-ascii")
 ```
 
-### Streaming API (Node v0.10+)
+### Streaming API
 ```javascript
 
-// Decode stream (from binary stream to js strings)
+// Decode stream (from binary data stream to js strings)
 http.createServer(function(req, res) {
     var converterStream = iconv.decodeStream('win1251');
     req.pipe(converterStream);
@@ -57,44 +59,10 @@ http.createServer(function(req, res) {
 });
 ```
 
-### [Deprecated] Extend Node.js own encodings
-> NOTE: This doesn't work on latest Node versions. See [details](https://github.com/ashtuchkin/iconv-lite/wiki/Node-v4-compatibility).
-
-```javascript
-// After this call all Node basic primitives will understand iconv-lite encodings.
-iconv.extendNodeEncodings();
-
-// Examples:
-buf = new Buffer(str, 'win1251');
-buf.write(str, 'gbk');
-str = buf.toString('latin1');
-assert(Buffer.isEncoding('iso-8859-15'));
-Buffer.byteLength(str, 'us-ascii');
-
-http.createServer(function(req, res) {
-    req.setEncoding('big5');
-    req.collect(function(err, body) {
-        console.log(body);
-    });
-});
-
-fs.createReadStream("file.txt", "shift_jis");
-
-// External modules are also supported (if they use Node primitives, which they probably do).
-request = require('request');
-request({
-    url: "http://github.com/", 
-    encoding: "cp932"
-});
-
-// To remove extensions
-iconv.undoExtendNodeEncodings();
-```
-
 ## Supported encodings
 
  *  All node.js native encodings: utf8, ucs2 / utf16-le, ascii, binary, base64, hex.
- *  Additional unicode encodings: utf16, utf16-be, utf-7, utf-7-imap.
+ *  Additional unicode encodings: utf16, utf16-be, utf-7, utf-7-imap, utf32, utf32-le, and utf32-be.
  *  All widespread singlebyte encodings: Windows 125x family, ISO-8859 family, 
     IBM/DOS codepages, Macintosh family, KOI8 family, all others supported by iconv library. 
     Aliases like 'latin1', 'us-ascii' also supported.
@@ -133,6 +101,12 @@ smart about endianness in the following ways:
    overridden with `defaultEncoding: 'utf-16be'` option. Strips BOM unless `stripBOM: false`.
  * Encoding: uses UTF-16LE and writes BOM by default. Use `addBOM: false` to override.
 
+## UTF-32 Encodings
+
+This library supports UTF-32LE, UTF-32BE and UTF-32 encodings. Like the UTF-16 encoding above, UTF-32 defaults to UTF-32LE, but uses BOM and 'spaces heuristics' to determine input endianness. 
+ * The default of UTF-32LE can be overridden with the `defaultEncoding: 'utf-32be'` option. Strips BOM unless `stripBOM: false`.
+ * Encoding: uses UTF-32LE and writes BOM by default. Use `addBOM: false` to override. (`defaultEncoding: 'utf-32be'` can also be used here to change encoding.)
+
 ## Other notes
 
 When decoding, be sure to supply a Buffer to decode() method, otherwise [bad things usually happen](https://github.com/ashtuchkin/iconv-lite/wiki/Use-Buffers-when-decoding).  
diff --git a/node_modules/iconv-lite/encodings/dbcs-codec.js b/node_modules/iconv-lite/encodings/dbcs-codec.js
index 1fe3e1601..fa8391703 100644
--- a/node_modules/iconv-lite/encodings/dbcs-codec.js
+++ b/node_modules/iconv-lite/encodings/dbcs-codec.js
@@ -49,6 +49,48 @@ function DBCSCodec(codecOptions, iconv) {
     for (var i = 0; i < mappingTable.length; i++)
         this._addDecodeChunk(mappingTable[i]);
 
+    // Load & create GB18030 tables when needed.
+    if (typeof codecOptions.gb18030 === 'function') {
+        this.gb18030 = codecOptions.gb18030(); // Load GB18030 ranges.
+
+        // Add GB18030 common decode nodes.
+        var commonThirdByteNodeIdx = this.decodeTables.length;
+        this.decodeTables.push(UNASSIGNED_NODE.slice(0));
+
+        var commonFourthByteNodeIdx = this.decodeTables.length;
+        this.decodeTables.push(UNASSIGNED_NODE.slice(0));
+
+        // Fill out the tree
+        var firstByteNode = this.decodeTables[0];
+        for (var i = 0x81; i <= 0xFE; i++) {
+            var secondByteNode = this.decodeTables[NODE_START - firstByteNode[i]];
+            for (var j = 0x30; j <= 0x39; j++) {
+                if (secondByteNode[j] === UNASSIGNED) {
+                    secondByteNode[j] = NODE_START - commonThirdByteNodeIdx;
+                } else if (secondByteNode[j] > NODE_START) {
+                    throw new Error("gb18030 decode tables conflict at byte 2");
+                }
+
+                var thirdByteNode = this.decodeTables[NODE_START - secondByteNode[j]];
+                for (var k = 0x81; k <= 0xFE; k++) {
+                    if (thirdByteNode[k] === UNASSIGNED) {
+                        thirdByteNode[k] = NODE_START - commonFourthByteNodeIdx;
+                    } else if (thirdByteNode[k] === NODE_START - commonFourthByteNodeIdx) {
+                        continue;
+                    } else if (thirdByteNode[k] > NODE_START) {
+                        throw new Error("gb18030 decode tables conflict at byte 3");
+                    }
+
+                    var fourthByteNode = this.decodeTables[NODE_START - thirdByteNode[k]];
+                    for (var l = 0x30; l <= 0x39; l++) {
+                        if (fourthByteNode[l] === UNASSIGNED)
+                            fourthByteNode[l] = GB18030_CODE;
+                    }
+                }
+            }
+        }
+    }
+
     this.defaultCharUnicode = iconv.defaultCharUnicode;
 
     
@@ -92,30 +134,6 @@ function DBCSCodec(codecOptions, iconv) {
     this.defCharSB  = this.encodeTable[0][iconv.defaultCharSingleByte.charCodeAt(0)];
     if (this.defCharSB === UNASSIGNED) this.defCharSB = this.encodeTable[0]['?'];
     if (this.defCharSB === UNASSIGNED) this.defCharSB = "?".charCodeAt(0);
-
-
-    // Load & create GB18030 tables when needed.
-    if (typeof codecOptions.gb18030 === 'function') {
-        this.gb18030 = codecOptions.gb18030(); // Load GB18030 ranges.
-
-        // Add GB18030 decode tables.
-        var thirdByteNodeIdx = this.decodeTables.length;
-        var thirdByteNode = this.decodeTables[thirdByteNodeIdx] = UNASSIGNED_NODE.slice(0);
-
-        var fourthByteNodeIdx = this.decodeTables.length;
-        var fourthByteNode = this.decodeTables[fourthByteNodeIdx] = UNASSIGNED_NODE.slice(0);
-
-        for (var i = 0x81; i <= 0xFE; i++) {
-            var secondByteNodeIdx = NODE_START - this.decodeTables[0][i];
-            var secondByteNode = this.decodeTables[secondByteNodeIdx];
-            for (var j = 0x30; j <= 0x39; j++)
-                secondByteNode[j] = NODE_START - thirdByteNodeIdx;
-        }
-        for (var i = 0x81; i <= 0xFE; i++)
-            thirdByteNode[i] = NODE_START - fourthByteNodeIdx;
-        for (var i = 0x30; i <= 0x39; i++)
-            fourthByteNode[i] = GB18030_CODE
-    }        
 }
 
 DBCSCodec.prototype.encoder = DBCSEncoder;
@@ -124,7 +142,7 @@ DBCSCodec.prototype.decoder = DBCSDecoder;
 // Decoder helpers
 DBCSCodec.prototype._getDecodeTrieNode = function(addr) {
     var bytes = [];
-    for (; addr > 0; addr >>= 8)
+    for (; addr > 0; addr >>>= 8)
         bytes.push(addr & 0xFF);
     if (bytes.length == 0)
         bytes.push(0);
@@ -249,19 +267,32 @@ DBCSCodec.prototype._setEncodeSequence = function(seq, dbcsCode) {
 
 DBCSCodec.prototype._fillEncodeTable = function(nodeIdx, prefix, skipEncodeChars) {
     var node = this.decodeTables[nodeIdx];
+    var hasValues = false;
+    var subNodeEmpty = {};
     for (var i = 0; i < 0x100; i++) {
         var uCode = node[i];
         var mbCode = prefix + i;
         if (skipEncodeChars[mbCode])
             continue;
 
-        if (uCode >= 0)
+        if (uCode >= 0) {
             this._setEncodeChar(uCode, mbCode);
-        else if (uCode <= NODE_START)
-            this._fillEncodeTable(NODE_START - uCode, mbCode << 8, skipEncodeChars);
-        else if (uCode <= SEQ_START)
+            hasValues = true;
+        } else if (uCode <= NODE_START) {
+            var subNodeIdx = NODE_START - uCode;
+            if (!subNodeEmpty[subNodeIdx]) {  // Skip empty subtrees (they are too large in gb18030).
+                var newPrefix = (mbCode << 8) >>> 0;  // NOTE: '>>> 0' keeps 32-bit num positive.
+                if (this._fillEncodeTable(subNodeIdx, newPrefix, skipEncodeChars))
+                    hasValues = true;
+                else
+                    subNodeEmpty[subNodeIdx] = true;
+            }
+        } else if (uCode <= SEQ_START) {
             this._setEncodeSequence(this.decodeTableSeq[SEQ_START - uCode], mbCode);
+            hasValues = true;
+        }
     }
+    return hasValues;
 }
 
 
@@ -388,10 +419,15 @@ DBCSEncoder.prototype.write = function(str) {
             newBuf[j++] = dbcsCode >> 8;   // high byte
             newBuf[j++] = dbcsCode & 0xFF; // low byte
         }
-        else {
+        else if (dbcsCode < 0x1000000) {
             newBuf[j++] = dbcsCode >> 16;
             newBuf[j++] = (dbcsCode >> 8) & 0xFF;
             newBuf[j++] = dbcsCode & 0xFF;
+        } else {
+            newBuf[j++] = dbcsCode >>> 24;
+            newBuf[j++] = (dbcsCode >>> 16) & 0xFF;
+            newBuf[j++] = (dbcsCode >>> 8) & 0xFF;
+            newBuf[j++] = dbcsCode & 0xFF;
         }
     }
 
@@ -440,7 +476,7 @@ DBCSEncoder.prototype.findIdx = findIdx;
 function DBCSDecoder(options, codec) {
     // Decoder state
     this.nodeIdx = 0;
-    this.prevBuf = Buffer.alloc(0);
+    this.prevBytes = [];
 
     // Static data
     this.decodeTables = codec.decodeTables;
@@ -452,15 +488,12 @@ function DBCSDecoder(options, codec) {
 DBCSDecoder.prototype.write = function(buf) {
     var newBuf = Buffer.alloc(buf.length*2),
         nodeIdx = this.nodeIdx, 
-        prevBuf = this.prevBuf, prevBufOffset = this.prevBuf.length,
-        seqStart = -this.prevBuf.length, // idx of the start of current parsed sequence.
+        prevBytes = this.prevBytes, prevOffset = this.prevBytes.length,
+        seqStart = -this.prevBytes.length, // idx of the start of current parsed sequence.
         uCode;
 
-    if (prevBufOffset > 0) // Make prev buf overlap a little to make it easier to slice later.
-        prevBuf = Buffer.concat([prevBuf, buf.slice(0, 10)]);
-    
     for (var i = 0, j = 0; i < buf.length; i++) {
-        var curByte = (i >= 0) ? buf[i] : prevBuf[i + prevBufOffset];
+        var curByte = (i >= 0) ? buf[i] : prevBytes[i + prevOffset];
 
         // Lookup in current trie node.
         var uCode = this.decodeTables[nodeIdx][curByte];
@@ -470,13 +503,18 @@ DBCSDecoder.prototype.write = function(buf) {
         }
         else if (uCode === UNASSIGNED) { // Unknown char.
             // TODO: Callback with seq.
-            //var curSeq = (seqStart >= 0) ? buf.slice(seqStart, i+1) : prevBuf.slice(seqStart + prevBufOffset, i+1 + prevBufOffset);
-            i = seqStart; // Try to parse again, after skipping first byte of the sequence ('i' will be incremented by 'for' cycle).
             uCode = this.defaultCharUnicode.charCodeAt(0);
+            i = seqStart; // Skip one byte ('i' will be incremented by the for loop) and try to parse again.
         }
         else if (uCode === GB18030_CODE) {
-            var curSeq = (seqStart >= 0) ? buf.slice(seqStart, i+1) : prevBuf.slice(seqStart + prevBufOffset, i+1 + prevBufOffset);
-            var ptr = (curSeq[0]-0x81)*12600 + (curSeq[1]-0x30)*1260 + (curSeq[2]-0x81)*10 + (curSeq[3]-0x30);
+            if (i >= 3) {
+                var ptr = (buf[i-3]-0x81)*12600 + (buf[i-2]-0x30)*1260 + (buf[i-1]-0x81)*10 + (curByte-0x30);
+            } else {
+                var ptr = (prevBytes[i-3+prevOffset]-0x81)*12600 + 
+                          (((i-2 >= 0) ? buf[i-2] : prevBytes[i-2+prevOffset])-0x30)*1260 + 
+                          (((i-1 >= 0) ? buf[i-1] : prevBytes[i-1+prevOffset])-0x81)*10 + 
+                          (curByte-0x30);
+            }
             var idx = findIdx(this.gb18030.gbChars, ptr);
             uCode = this.gb18030.uChars[idx] + ptr - this.gb18030.gbChars[idx];
         }
@@ -497,13 +535,13 @@ DBCSDecoder.prototype.write = function(buf) {
             throw new Error("iconv-lite internal error: invalid decoding table value " + uCode + " at " + nodeIdx + "/" + curByte);
 
         // Write the character to buffer, handling higher planes using surrogate pair.
-        if (uCode > 0xFFFF) { 
+        if (uCode >= 0x10000) { 
             uCode -= 0x10000;
-            var uCodeLead = 0xD800 + Math.floor(uCode / 0x400);
+            var uCodeLead = 0xD800 | (uCode >> 10);
             newBuf[j++] = uCodeLead & 0xFF;
             newBuf[j++] = uCodeLead >> 8;
 
-            uCode = 0xDC00 + uCode % 0x400;
+            uCode = 0xDC00 | (uCode & 0x3FF);
         }
         newBuf[j++] = uCode & 0xFF;
         newBuf[j++] = uCode >> 8;
@@ -513,7 +551,10 @@ DBCSDecoder.prototype.write = function(buf) {
     }
 
     this.nodeIdx = nodeIdx;
-    this.prevBuf = (seqStart >= 0) ? buf.slice(seqStart) : prevBuf.slice(seqStart + prevBufOffset);
+    this.prevBytes = (seqStart >= 0)
+        ? Array.prototype.slice.call(buf, seqStart)
+        : prevBytes.slice(seqStart + prevOffset).concat(Array.prototype.slice.call(buf));
+
     return newBuf.slice(0, j).toString('ucs2');
 }
 
@@ -521,18 +562,19 @@ DBCSDecoder.prototype.end = function() {
     var ret = '';
 
     // Try to parse all remaining chars.
-    while (this.prevBuf.length > 0) {
+    while (this.prevBytes.length > 0) {
         // Skip 1 character in the buffer.
         ret += this.defaultCharUnicode;
-        var buf = this.prevBuf.slice(1);
+        var bytesArr = this.prevBytes.slice(1);
 
         // Parse remaining as usual.
-        this.prevBuf = Buffer.alloc(0);
+        this.prevBytes = [];
         this.nodeIdx = 0;
-        if (buf.length > 0)
-            ret += this.write(buf);
+        if (bytesArr.length > 0)
+            ret += this.write(bytesArr);
     }
 
+    this.prevBytes = [];
     this.nodeIdx = 0;
     return ret;
 }
@@ -544,7 +586,7 @@ function findIdx(table, val) {
 
     var l = 0, r = table.length;
     while (l < r-1) { // always table[l] <= val < table[r]
-        var mid = l + Math.floor((r-l+1)/2);
+        var mid = l + ((r-l+1) >> 1);
         if (table[mid] <= val)
             l = mid;
         else
diff --git a/node_modules/iconv-lite/encodings/index.js b/node_modules/iconv-lite/encodings/index.js
index e30400317..d95c24411 100644
--- a/node_modules/iconv-lite/encodings/index.js
+++ b/node_modules/iconv-lite/encodings/index.js
@@ -4,6 +4,7 @@
 // We support Browserify by skipping automatic module discovery and requiring modules directly.
 var modules = [
     require("./internal"),
+    require("./utf32"),
     require("./utf16"),
     require("./utf7"),
     require("./sbcs-codec"),
@@ -13,7 +14,7 @@ var modules = [
     require("./dbcs-data"),
 ];
 
-// Put all encoding/alias/codec definitions to single object and export it. 
+// Put all encoding/alias/codec definitions to single object and export it.
 for (var i = 0; i < modules.length; i++) {
     var module = modules[i];
     for (var enc in module)
diff --git a/node_modules/iconv-lite/encodings/internal.js b/node_modules/iconv-lite/encodings/internal.js
index 05ce38b27..dc1074f04 100644
--- a/node_modules/iconv-lite/encodings/internal.js
+++ b/node_modules/iconv-lite/encodings/internal.js
@@ -53,10 +53,20 @@ if (!StringDecoder.prototype.end) // Node v0.8 doesn't have this method.
 
 
 function InternalDecoder(options, codec) {
-    StringDecoder.call(this, codec.enc);
+    this.decoder = new StringDecoder(codec.enc);
 }
 
-InternalDecoder.prototype = StringDecoder.prototype;
+InternalDecoder.prototype.write = function(buf) {
+    if (!Buffer.isBuffer(buf)) {
+        buf = Buffer.from(buf);
+    }
+
+    return this.decoder.write(buf);
+}
+
+InternalDecoder.prototype.end = function() {
+    return this.decoder.end();
+}
 
 
 //------------------------------------------------------------------------------
diff --git a/node_modules/iconv-lite/encodings/sbcs-codec.js b/node_modules/iconv-lite/encodings/sbcs-codec.js
index f2258237b..abac5ffaa 100644
--- a/node_modules/iconv-lite/encodings/sbcs-codec.js
+++ b/node_modules/iconv-lite/encodings/sbcs-codec.js
@@ -20,10 +20,10 @@ function SBCSCodec(codecOptions, iconv) {
         codecOptions.chars = asciiString + codecOptions.chars;
     }
 
-    this.decodeBuf = new Buffer.from(codecOptions.chars, 'ucs2');
+    this.decodeBuf = Buffer.from(codecOptions.chars, 'ucs2');
     
     // Encoding buffer.
-    var encodeBuf = new Buffer.alloc(65536, iconv.defaultCharSingleByte.charCodeAt(0));
+    var encodeBuf = Buffer.alloc(65536, iconv.defaultCharSingleByte.charCodeAt(0));
 
     for (var i = 0; i < codecOptions.chars.length; i++)
         encodeBuf[codecOptions.chars.charCodeAt(i)] = i;
diff --git a/node_modules/iconv-lite/encodings/sbcs-data.js b/node_modules/iconv-lite/encodings/sbcs-data.js
index 2d6f846ad..066f904e5 100644
--- a/node_modules/iconv-lite/encodings/sbcs-data.js
+++ b/node_modules/iconv-lite/encodings/sbcs-data.js
@@ -17,6 +17,16 @@ module.exports = {
         "chars": "АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмноп░▒▓│┤╡╢╖╕╣║╗╝╜╛┐└┴┬├─┼╞╟╚╔╩╦╠═╬╧╨╤╥╙╘╒╓╫╪┘┌█▄▌▐▀рстуфхцчшщъыьэюяЁёЄєЇїЎў°∙·√№€■ "
     },
 
+    "mik": {
+        "type": "_sbcs",
+        "chars": "АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмнопрстуфхцчшщъыьэюя└┴┬├─┼╣║╚╔╩╦╠═╬┐░▒▓│┤№§╗╝┘┌█▄▌▐▀αßΓπΣσµτΦΘΩδ∞φε∩≡±≥≤⌠⌡÷≈°∙·√ⁿ²■ "
+    },
+
+    "cp720": {
+        "type": "_sbcs",
+        "chars": "\x80\x81éâ\x84à\x86çêëèïî\x8d\x8e\x8f\x90\u0651\u0652ô¤ـûùءآأؤ£إئابةتثجحخدذرزسشص«»░▒▓│┤╡╢╖╕╣║╗╝╜╛┐└┴┬├─┼╞╟╚╔╩╦╠═╬╧╨╤╥╙╘╒╓╫╪┘┌█▄▌▐▀ضطظعغفµقكلمنهوىي≡\u064b\u064c\u064d\u064e\u064f\u0650≈°∙·√ⁿ²■\u00a0"
+    },
+
     // Aliases of generated encodings.
     "ascii8bit": "ascii",
     "usascii": "ascii",
diff --git a/node_modules/iconv-lite/encodings/tables/gbk-added.json b/node_modules/iconv-lite/encodings/tables/gbk-added.json
index 8abfa9f7b..b742e368f 100644
--- a/node_modules/iconv-lite/encodings/tables/gbk-added.json
+++ b/node_modules/iconv-lite/encodings/tables/gbk-added.json
@@ -27,7 +27,7 @@
 ["a7c2","",14],
 ["a7f2","",12],
 ["a896","",10],
-["a8bc",""],
+["a8bc","ḿ"],
 ["a8bf","ǹ"],
 ["a8c1",""],
 ["a8ea","",20],
@@ -51,5 +51,6 @@
 ["fca1","",93],
 ["fda1","",93],
 ["fe50","⺁⺄㑳㑇⺈⺋㖞㘚㘎⺌⺗㥮㤘㧏㧟㩳㧐㭎㱮㳠⺧⺪䁖䅟⺮䌷⺳⺶⺷䎱䎬⺻䏝䓖䙡䙌"],
-["fe80","䜣䜩䝼䞍⻊䥇䥺䥽䦂䦃䦅䦆䦟䦛䦷䦶䲣䲟䲠䲡䱷䲢䴓",6,"䶮",93]
+["fe80","䜣䜩䝼䞍⻊䥇䥺䥽䦂䦃䦅䦆䦟䦛䦷䦶䲣䲟䲠䲡䱷䲢䴓",6,"䶮",93],
+["8135f437",""]
 ]
diff --git a/node_modules/iconv-lite/encodings/utf16.js b/node_modules/iconv-lite/encodings/utf16.js
index 54765aeee..97d066925 100644
--- a/node_modules/iconv-lite/encodings/utf16.js
+++ b/node_modules/iconv-lite/encodings/utf16.js
@@ -61,6 +61,7 @@ Utf16BEDecoder.prototype.write = function(buf) {
 }
 
 Utf16BEDecoder.prototype.end = function() {
+    this.overflowByte = -1;
 }
 
 
@@ -103,8 +104,8 @@ Utf16Encoder.prototype.end = function() {
 
 function Utf16Decoder(options, codec) {
     this.decoder = null;
-    this.initialBytes = [];
-    this.initialBytesLen = 0;
+    this.initialBufs = [];
+    this.initialBufsLen = 0;
 
     this.options = options || {};
     this.iconv = codec.iconv;
@@ -113,17 +114,22 @@ function Utf16Decoder(options, codec) {
 Utf16Decoder.prototype.write = function(buf) {
     if (!this.decoder) {
         // Codec is not chosen yet. Accumulate initial bytes.
-        this.initialBytes.push(buf);
-        this.initialBytesLen += buf.length;
+        this.initialBufs.push(buf);
+        this.initialBufsLen += buf.length;
         
-        if (this.initialBytesLen < 16) // We need more bytes to use space heuristic (see below)
+        if (this.initialBufsLen < 16) // We need more bytes to use space heuristic (see below)
             return '';
 
         // We have enough bytes -> detect endianness.
-        var buf = Buffer.concat(this.initialBytes),
-            encoding = detectEncoding(buf, this.options.defaultEncoding);
+        var encoding = detectEncoding(this.initialBufs, this.options.defaultEncoding);
         this.decoder = this.iconv.getDecoder(encoding, this.options);
-        this.initialBytes.length = this.initialBytesLen = 0;
+
+        var resStr = '';
+        for (var i = 0; i < this.initialBufs.length; i++)
+            resStr += this.decoder.write(this.initialBufs[i]);
+
+        this.initialBufs.length = this.initialBufsLen = 0;
+        return resStr;
     }
 
     return this.decoder.write(buf);
@@ -131,47 +137,61 @@ Utf16Decoder.prototype.write = function(buf) {
 
 Utf16Decoder.prototype.end = function() {
     if (!this.decoder) {
-        var buf = Buffer.concat(this.initialBytes),
-            encoding = detectEncoding(buf, this.options.defaultEncoding);
+        var encoding = detectEncoding(this.initialBufs, this.options.defaultEncoding);
         this.decoder = this.iconv.getDecoder(encoding, this.options);
 
-        var res = this.decoder.write(buf),
-            trail = this.decoder.end();
+        var resStr = '';
+        for (var i = 0; i < this.initialBufs.length; i++)
+            resStr += this.decoder.write(this.initialBufs[i]);
 
-        return trail ? (res + trail) : res;
+        var trail = this.decoder.end();
+        if (trail)
+            resStr += trail;
+
+        this.initialBufs.length = this.initialBufsLen = 0;
+        return resStr;
     }
     return this.decoder.end();
 }
 
-function detectEncoding(buf, defaultEncoding) {
-    var enc = defaultEncoding || 'utf-16le';
-
-    if (buf.length >= 2) {
-        // Check BOM.
-        if (buf[0] == 0xFE && buf[1] == 0xFF) // UTF-16BE BOM
-            enc = 'utf-16be';
-        else if (buf[0] == 0xFF && buf[1] == 0xFE) // UTF-16LE BOM
-            enc = 'utf-16le';
-        else {
-            // No BOM found. Try to deduce encoding from initial content.
-            // Most of the time, the content has ASCII chars (U+00**), but the opposite (U+**00) is uncommon.
-            // So, we count ASCII as if it was LE or BE, and decide from that.
-            var asciiCharsLE = 0, asciiCharsBE = 0, // Counts of chars in both positions
-                _len = Math.min(buf.length - (buf.length % 2), 64); // Len is always even.
-
-            for (var i = 0; i < _len; i += 2) {
-                if (buf[i] === 0 && buf[i+1] !== 0) asciiCharsBE++;
-                if (buf[i] !== 0 && buf[i+1] === 0) asciiCharsLE++;
+function detectEncoding(bufs, defaultEncoding) {
+    var b = [];
+    var charsProcessed = 0;
+    var asciiCharsLE = 0, asciiCharsBE = 0; // Number of ASCII chars when decoded as LE or BE.
+
+    outer_loop:
+    for (var i = 0; i < bufs.length; i++) {
+        var buf = bufs[i];
+        for (var j = 0; j < buf.length; j++) {
+            b.push(buf[j]);
+            if (b.length === 2) {
+                if (charsProcessed === 0) {
+                    // Check BOM first.
+                    if (b[0] === 0xFF && b[1] === 0xFE) return 'utf-16le';
+                    if (b[0] === 0xFE && b[1] === 0xFF) return 'utf-16be';
+                }
+
+                if (b[0] === 0 && b[1] !== 0) asciiCharsBE++;
+                if (b[0] !== 0 && b[1] === 0) asciiCharsLE++;
+
+                b.length = 0;
+                charsProcessed++;
+
+                if (charsProcessed >= 100) {
+                    break outer_loop;
+                }
             }
-
-            if (asciiCharsBE > asciiCharsLE)
-                enc = 'utf-16be';
-            else if (asciiCharsBE < asciiCharsLE)
-                enc = 'utf-16le';
         }
     }
 
-    return enc;
+    // Make decisions.
+    // Most of the time, the content has ASCII chars (U+00**), but the opposite (U+**00) is uncommon.
+    // So, we count ASCII as if it was LE or BE, and decide from that.
+    if (asciiCharsBE > asciiCharsLE) return 'utf-16be';
+    if (asciiCharsBE < asciiCharsLE) return 'utf-16le';
+
+    // Couldn't decide (likely all zeros or not enough data).
+    return defaultEncoding || 'utf-16le';
 }
 
 
diff --git a/node_modules/iconv-lite/encodings/utf32.js b/node_modules/iconv-lite/encodings/utf32.js
new file mode 100644
index 000000000..2fa900a12
--- /dev/null
+++ b/node_modules/iconv-lite/encodings/utf32.js
@@ -0,0 +1,319 @@
+'use strict';
+
+var Buffer = require('safer-buffer').Buffer;
+
+// == UTF32-LE/BE codec. ==========================================================
+
+exports._utf32 = Utf32Codec;
+
+function Utf32Codec(codecOptions, iconv) {
+    this.iconv = iconv;
+    this.bomAware = true;
+    this.isLE = codecOptions.isLE;
+}
+
+exports.utf32le = { type: '_utf32', isLE: true };
+exports.utf32be = { type: '_utf32', isLE: false };
+
+// Aliases
+exports.ucs4le = 'utf32le';
+exports.ucs4be = 'utf32be';
+
+Utf32Codec.prototype.encoder = Utf32Encoder;
+Utf32Codec.prototype.decoder = Utf32Decoder;
+
+// -- Encoding
+
+function Utf32Encoder(options, codec) {
+    this.isLE = codec.isLE;
+    this.highSurrogate = 0;
+}
+
+Utf32Encoder.prototype.write = function(str) {
+    var src = Buffer.from(str, 'ucs2');
+    var dst = Buffer.alloc(src.length * 2);
+    var write32 = this.isLE ? dst.writeUInt32LE : dst.writeUInt32BE;
+    var offset = 0;
+
+    for (var i = 0; i < src.length; i += 2) {
+        var code = src.readUInt16LE(i);
+        var isHighSurrogate = (0xD800 <= code && code < 0xDC00);
+        var isLowSurrogate = (0xDC00 <= code && code < 0xE000);
+
+        if (this.highSurrogate) {
+            if (isHighSurrogate || !isLowSurrogate) {
+                // There shouldn't be two high surrogates in a row, nor a high surrogate which isn't followed by a low
+                // surrogate. If this happens, keep the pending high surrogate as a stand-alone semi-invalid character
+                // (technically wrong, but expected by some applications, like Windows file names).
+                write32.call(dst, this.highSurrogate, offset);
+                offset += 4;
+            }
+            else {
+                // Create 32-bit value from high and low surrogates;
+                var codepoint = (((this.highSurrogate - 0xD800) << 10) | (code - 0xDC00)) + 0x10000;
+
+                write32.call(dst, codepoint, offset);
+                offset += 4;
+                this.highSurrogate = 0;
+
+                continue;
+            }
+        }
+
+        if (isHighSurrogate)
+            this.highSurrogate = code;
+        else {
+            // Even if the current character is a low surrogate, with no previous high surrogate, we'll
+            // encode it as a semi-invalid stand-alone character for the same reasons expressed above for
+            // unpaired high surrogates.
+            write32.call(dst, code, offset);
+            offset += 4;
+            this.highSurrogate = 0;
+        }
+    }
+
+    if (offset < dst.length)
+        dst = dst.slice(0, offset);
+
+    return dst;
+};
+
+Utf32Encoder.prototype.end = function() {
+    // Treat any leftover high surrogate as a semi-valid independent character.
+    if (!this.highSurrogate)
+        return;
+
+    var buf = Buffer.alloc(4);
+
+    if (this.isLE)
+        buf.writeUInt32LE(this.highSurrogate, 0);
+    else
+        buf.writeUInt32BE(this.highSurrogate, 0);
+
+    this.highSurrogate = 0;
+
+    return buf;
+};
+
+// -- Decoding
+
+function Utf32Decoder(options, codec) {
+    this.isLE = codec.isLE;
+    this.badChar = codec.iconv.defaultCharUnicode.charCodeAt(0);
+    this.overflow = [];
+}
+
+Utf32Decoder.prototype.write = function(src) {
+    if (src.length === 0)
+        return '';
+
+    var i = 0;
+    var codepoint = 0;
+    var dst = Buffer.alloc(src.length + 4);
+    var offset = 0;
+    var isLE = this.isLE;
+    var overflow = this.overflow;
+    var badChar = this.badChar;
+
+    if (overflow.length > 0) {
+        for (; i < src.length && overflow.length < 4; i++)
+            overflow.push(src[i]);
+        
+        if (overflow.length === 4) {
+            // NOTE: codepoint is a signed int32 and can be negative.
+            // NOTE: We copied this block from below to help V8 optimize it (it works with array, not buffer).
+            if (isLE) {
+                codepoint = overflow[i] | (overflow[i+1] << 8) | (overflow[i+2] << 16) | (overflow[i+3] << 24);
+            } else {
+                codepoint = overflow[i+3] | (overflow[i+2] << 8) | (overflow[i+1] << 16) | (overflow[i] << 24);
+            }
+            overflow.length = 0;
+
+            offset = _writeCodepoint(dst, offset, codepoint, badChar);
+        }
+    }
+
+    // Main loop. Should be as optimized as possible.
+    for (; i < src.length - 3; i += 4) {
+        // NOTE: codepoint is a signed int32 and can be negative.
+        if (isLE) {
+            codepoint = src[i] | (src[i+1] << 8) | (src[i+2] << 16) | (src[i+3] << 24);
+        } else {
+            codepoint = src[i+3] | (src[i+2] << 8) | (src[i+1] << 16) | (src[i] << 24);
+        }
+        offset = _writeCodepoint(dst, offset, codepoint, badChar);
+    }
+
+    // Keep overflowing bytes.
+    for (; i < src.length; i++) {
+        overflow.push(src[i]);
+    }
+
+    return dst.slice(0, offset).toString('ucs2');
+};
+
+function _writeCodepoint(dst, offset, codepoint, badChar) {
+    // NOTE: codepoint is signed int32 and can be negative. We keep it that way to help V8 with optimizations.
+    if (codepoint < 0 || codepoint > 0x10FFFF) {
+        // Not a valid Unicode codepoint
+        codepoint = badChar;
+    } 
+
+    // Ephemeral Planes: Write high surrogate.
+    if (codepoint >= 0x10000) {
+        codepoint -= 0x10000;
+
+        var high = 0xD800 | (codepoint >> 10);
+        dst[offset++] = high & 0xff;
+        dst[offset++] = high >> 8;
+
+        // Low surrogate is written below.
+        var codepoint = 0xDC00 | (codepoint & 0x3FF);
+    }
+
+    // Write BMP char or low surrogate.
+    dst[offset++] = codepoint & 0xff;
+    dst[offset++] = codepoint >> 8;
+
+    return offset;
+};
+
+Utf32Decoder.prototype.end = function() {
+    this.overflow.length = 0;
+};
+
+// == UTF-32 Auto codec =============================================================
+// Decoder chooses automatically from UTF-32LE and UTF-32BE using BOM and space-based heuristic.
+// Defaults to UTF-32LE. http://en.wikipedia.org/wiki/UTF-32
+// Encoder/decoder default can be changed: iconv.decode(buf, 'utf32', {defaultEncoding: 'utf-32be'});
+
+// Encoder prepends BOM (which can be overridden with (addBOM: false}).
+
+exports.utf32 = Utf32AutoCodec;
+exports.ucs4 = 'utf32';
+
+function Utf32AutoCodec(options, iconv) {
+    this.iconv = iconv;
+}
+
+Utf32AutoCodec.prototype.encoder = Utf32AutoEncoder;
+Utf32AutoCodec.prototype.decoder = Utf32AutoDecoder;
+
+// -- Encoding
+
+function Utf32AutoEncoder(options, codec) {
+    options = options || {};
+
+    if (options.addBOM === undefined)
+        options.addBOM = true;
+
+    this.encoder = codec.iconv.getEncoder(options.defaultEncoding || 'utf-32le', options);
+}
+
+Utf32AutoEncoder.prototype.write = function(str) {
+    return this.encoder.write(str);
+};
+
+Utf32AutoEncoder.prototype.end = function() {
+    return this.encoder.end();
+};
+
+// -- Decoding
+
+function Utf32AutoDecoder(options, codec) {
+    this.decoder = null;
+    this.initialBufs = [];
+    this.initialBufsLen = 0;
+    this.options = options || {};
+    this.iconv = codec.iconv;
+}
+
+Utf32AutoDecoder.prototype.write = function(buf) {
+    if (!this.decoder) { 
+        // Codec is not chosen yet. Accumulate initial bytes.
+        this.initialBufs.push(buf);
+        this.initialBufsLen += buf.length;
+
+        if (this.initialBufsLen < 32) // We need more bytes to use space heuristic (see below)
+            return '';
+
+        // We have enough bytes -> detect endianness.
+        var encoding = detectEncoding(this.initialBufs, this.options.defaultEncoding);
+        this.decoder = this.iconv.getDecoder(encoding, this.options);
+
+        var resStr = '';
+        for (var i = 0; i < this.initialBufs.length; i++)
+            resStr += this.decoder.write(this.initialBufs[i]);
+
+        this.initialBufs.length = this.initialBufsLen = 0;
+        return resStr;
+    }
+
+    return this.decoder.write(buf);
+};
+
+Utf32AutoDecoder.prototype.end = function() {
+    if (!this.decoder) {
+        var encoding = detectEncoding(this.initialBufs, this.options.defaultEncoding);
+        this.decoder = this.iconv.getDecoder(encoding, this.options);
+
+        var resStr = '';
+        for (var i = 0; i < this.initialBufs.length; i++)
+            resStr += this.decoder.write(this.initialBufs[i]);
+
+        var trail = this.decoder.end();
+        if (trail)
+            resStr += trail;
+
+        this.initialBufs.length = this.initialBufsLen = 0;
+        return resStr;
+    }
+
+    return this.decoder.end();
+};
+
+function detectEncoding(bufs, defaultEncoding) {
+    var b = [];
+    var charsProcessed = 0;
+    var invalidLE = 0, invalidBE = 0;   // Number of invalid chars when decoded as LE or BE.
+    var bmpCharsLE = 0, bmpCharsBE = 0; // Number of BMP chars when decoded as LE or BE.
+
+    outer_loop:
+    for (var i = 0; i < bufs.length; i++) {
+        var buf = bufs[i];
+        for (var j = 0; j < buf.length; j++) {
+            b.push(buf[j]);
+            if (b.length === 4) {
+                if (charsProcessed === 0) {
+                    // Check BOM first.
+                    if (b[0] === 0xFF && b[1] === 0xFE && b[2] === 0 && b[3] === 0) {
+                        return 'utf-32le';
+                    }
+                    if (b[0] === 0 && b[1] === 0 && b[2] === 0xFE && b[3] === 0xFF) {
+                        return 'utf-32be';
+                    }
+                }
+
+                if (b[0] !== 0 || b[1] > 0x10) invalidBE++;
+                if (b[3] !== 0 || b[2] > 0x10) invalidLE++;
+
+                if (b[0] === 0 && b[1] === 0 && (b[2] !== 0 || b[3] !== 0)) bmpCharsBE++;
+                if ((b[0] !== 0 || b[1] !== 0) && b[2] === 0 && b[3] === 0) bmpCharsLE++;
+
+                b.length = 0;
+                charsProcessed++;
+
+                if (charsProcessed >= 100) {
+                    break outer_loop;
+                }
+            }
+        }
+    }
+
+    // Make decisions.
+    if (bmpCharsBE - invalidBE > bmpCharsLE - invalidLE)  return 'utf-32be';
+    if (bmpCharsBE - invalidBE < bmpCharsLE - invalidLE)  return 'utf-32le';
+
+    // Couldn't decide (likely all zeros or not enough data).
+    return defaultEncoding || 'utf-32le';
+}
diff --git a/node_modules/iconv-lite/encodings/utf7.js b/node_modules/iconv-lite/encodings/utf7.js
index b7631c23a..eacae34d5 100644
--- a/node_modules/iconv-lite/encodings/utf7.js
+++ b/node_modules/iconv-lite/encodings/utf7.js
@@ -74,7 +74,7 @@ Utf7Decoder.prototype.write = function(buf) {
                 if (i == lastI && buf[i] == minusChar) {// "+-" -> "+"
                     res += "+";
                 } else {
-                    var b64str = base64Accum + buf.slice(lastI, i).toString();
+                    var b64str = base64Accum + this.iconv.decode(buf.slice(lastI, i), "ascii");
                     res += this.iconv.decode(Buffer.from(b64str, 'base64'), "utf16-be");
                 }
 
@@ -91,7 +91,7 @@ Utf7Decoder.prototype.write = function(buf) {
     if (!inBase64) {
         res += this.iconv.decode(buf.slice(lastI), "ascii"); // Write direct chars.
     } else {
-        var b64str = base64Accum + buf.slice(lastI).toString();
+        var b64str = base64Accum + this.iconv.decode(buf.slice(lastI), "ascii");
 
         var canBeDecoded = b64str.length - (b64str.length % 8); // Minimal chunk: 2 quads -> 2x3 bytes -> 3 chars.
         base64Accum = b64str.slice(canBeDecoded); // The rest will be decoded in future.
@@ -245,7 +245,7 @@ Utf7IMAPDecoder.prototype.write = function(buf) {
                 if (i == lastI && buf[i] == minusChar) { // "&-" -> "&"
                     res += "&";
                 } else {
-                    var b64str = base64Accum + buf.slice(lastI, i).toString().replace(/,/g, '/');
+                    var b64str = base64Accum + this.iconv.decode(buf.slice(lastI, i), "ascii").replace(/,/g, '/');
                     res += this.iconv.decode(Buffer.from(b64str, 'base64'), "utf16-be");
                 }
 
@@ -262,7 +262,7 @@ Utf7IMAPDecoder.prototype.write = function(buf) {
     if (!inBase64) {
         res += this.iconv.decode(buf.slice(lastI), "ascii"); // Write direct chars.
     } else {
-        var b64str = base64Accum + buf.slice(lastI).toString().replace(/,/g, '/');
+        var b64str = base64Accum + this.iconv.decode(buf.slice(lastI), "ascii").replace(/,/g, '/');
 
         var canBeDecoded = b64str.length - (b64str.length % 8); // Minimal chunk: 2 quads -> 2x3 bytes -> 3 chars.
         base64Accum = b64str.slice(canBeDecoded); // The rest will be decoded in future.
diff --git a/node_modules/iconv-lite/lib/extend-node.js b/node_modules/iconv-lite/lib/extend-node.js
deleted file mode 100644
index 87f5394a4..000000000
--- a/node_modules/iconv-lite/lib/extend-node.js
+++ /dev/null
@@ -1,217 +0,0 @@
-"use strict";
-var Buffer = require("buffer").Buffer;
-// Note: not polyfilled with safer-buffer on a purpose, as overrides Buffer
-
-// == Extend Node primitives to use iconv-lite =================================
-
-module.exports = function (iconv) {
-    var original = undefined; // Place to keep original methods.
-
-    // Node authors rewrote Buffer internals to make it compatible with
-    // Uint8Array and we cannot patch key functions since then.
-    // Note: this does use older Buffer API on a purpose
-    iconv.supportsNodeEncodingsExtension = !(Buffer.from || new Buffer(0) instanceof Uint8Array);
-
-    iconv.extendNodeEncodings = function extendNodeEncodings() {
-        if (original) return;
-        original = {};
-
-        if (!iconv.supportsNodeEncodingsExtension) {
-            console.error("ACTION NEEDED: require('iconv-lite').extendNodeEncodings() is not supported in your version of Node");
-            console.error("See more info at https://github.com/ashtuchkin/iconv-lite/wiki/Node-v4-compatibility");
-            return;
-        }
-
-        var nodeNativeEncodings = {
-            'hex': true, 'utf8': true, 'utf-8': true, 'ascii': true, 'binary': true, 
-            'base64': true, 'ucs2': true, 'ucs-2': true, 'utf16le': true, 'utf-16le': true,
-        };
-
-        Buffer.isNativeEncoding = function(enc) {
-            return enc && nodeNativeEncodings[enc.toLowerCase()];
-        }
-
-        // -- SlowBuffer -----------------------------------------------------------
-        var SlowBuffer = require('buffer').SlowBuffer;
-
-        original.SlowBufferToString = SlowBuffer.prototype.toString;
-        SlowBuffer.prototype.toString = function(encoding, start, end) {
-            encoding = String(encoding || 'utf8').toLowerCase();
-
-            // Use native conversion when possible
-            if (Buffer.isNativeEncoding(encoding))
-                return original.SlowBufferToString.call(this, encoding, start, end);
-
-            // Otherwise, use our decoding method.
-            if (typeof start == 'undefined') start = 0;
-            if (typeof end == 'undefined') end = this.length;
-            return iconv.decode(this.slice(start, end), encoding);
-        }
-
-        original.SlowBufferWrite = SlowBuffer.prototype.write;
-        SlowBuffer.prototype.write = function(string, offset, length, encoding) {
-            // Support both (string, offset, length, encoding)
-            // and the legacy (string, encoding, offset, length)
-            if (isFinite(offset)) {
-                if (!isFinite(length)) {
-                    encoding = length;
-                    length = undefined;
-                }
-            } else {  // legacy
-                var swap = encoding;
-                encoding = offset;
-                offset = length;
-                length = swap;
-            }
-
-            offset = +offset || 0;
-            var remaining = this.length - offset;
-            if (!length) {
-                length = remaining;
-            } else {
-                length = +length;
-                if (length > remaining) {
-                    length = remaining;
-                }
-            }
-            encoding = String(encoding || 'utf8').toLowerCase();
-
-            // Use native conversion when possible
-            if (Buffer.isNativeEncoding(encoding))
-                return original.SlowBufferWrite.call(this, string, offset, length, encoding);
-
-            if (string.length > 0 && (length < 0 || offset < 0))
-                throw new RangeError('attempt to write beyond buffer bounds');
-
-            // Otherwise, use our encoding method.
-            var buf = iconv.encode(string, encoding);
-            if (buf.length < length) length = buf.length;
-            buf.copy(this, offset, 0, length);
-            return length;
-        }
-
-        // -- Buffer ---------------------------------------------------------------
-
-        original.BufferIsEncoding = Buffer.isEncoding;
-        Buffer.isEncoding = function(encoding) {
-            return Buffer.isNativeEncoding(encoding) || iconv.encodingExists(encoding);
-        }
-
-        original.BufferByteLength = Buffer.byteLength;
-        Buffer.byteLength = SlowBuffer.byteLength = function(str, encoding) {
-            encoding = String(encoding || 'utf8').toLowerCase();
-
-            // Use native conversion when possible
-            if (Buffer.isNativeEncoding(encoding))
-                return original.BufferByteLength.call(this, str, encoding);
-
-            // Slow, I know, but we don't have a better way yet.
-            return iconv.encode(str, encoding).length;
-        }
-
-        original.BufferToString = Buffer.prototype.toString;
-        Buffer.prototype.toString = function(encoding, start, end) {
-            encoding = String(encoding || 'utf8').toLowerCase();
-
-            // Use native conversion when possible
-            if (Buffer.isNativeEncoding(encoding))
-                return original.BufferToString.call(this, encoding, start, end);
-
-            // Otherwise, use our decoding method.
-            if (typeof start == 'undefined') start = 0;
-            if (typeof end == 'undefined') end = this.length;
-            return iconv.decode(this.slice(start, end), encoding);
-        }
-
-        original.BufferWrite = Buffer.prototype.write;
-        Buffer.prototype.write = function(string, offset, length, encoding) {
-            var _offset = offset, _length = length, _encoding = encoding;
-            // Support both (string, offset, length, encoding)
-            // and the legacy (string, encoding, offset, length)
-            if (isFinite(offset)) {
-                if (!isFinite(length)) {
-                    encoding = length;
-                    length = undefined;
-                }
-            } else {  // legacy
-                var swap = encoding;
-                encoding = offset;
-                offset = length;
-                length = swap;
-            }
-
-            encoding = String(encoding || 'utf8').toLowerCase();
-
-            // Use native conversion when possible
-            if (Buffer.isNativeEncoding(encoding))
-                return original.BufferWrite.call(this, string, _offset, _length, _encoding);
-
-            offset = +offset || 0;
-            var remaining = this.length - offset;
-            if (!length) {
-                length = remaining;
-            } else {
-                length = +length;
-                if (length > remaining) {
-                    length = remaining;
-                }
-            }
-
-            if (string.length > 0 && (length < 0 || offset < 0))
-                throw new RangeError('attempt to write beyond buffer bounds');
-
-            // Otherwise, use our encoding method.
-            var buf = iconv.encode(string, encoding);
-            if (buf.length < length) length = buf.length;
-            buf.copy(this, offset, 0, length);
-            return length;
-
-            // TODO: Set _charsWritten.
-        }
-
-
-        // -- Readable -------------------------------------------------------------
-        if (iconv.supportsStreams) {
-            var Readable = require('stream').Readable;
-
-            original.ReadableSetEncoding = Readable.prototype.setEncoding;
-            Readable.prototype.setEncoding = function setEncoding(enc, options) {
-                // Use our own decoder, it has the same interface.
-                // We cannot use original function as it doesn't handle BOM-s.
-                this._readableState.decoder = iconv.getDecoder(enc, options);
-                this._readableState.encoding = enc;
-            }
-
-            Readable.prototype.collect = iconv._collect;
-        }
-    }
-
-    // Remove iconv-lite Node primitive extensions.
-    iconv.undoExtendNodeEncodings = function undoExtendNodeEncodings() {
-        if (!iconv.supportsNodeEncodingsExtension)
-            return;
-        if (!original)
-            throw new Error("require('iconv-lite').undoExtendNodeEncodings(): Nothing to undo; extendNodeEncodings() is not called.")
-
-        delete Buffer.isNativeEncoding;
-
-        var SlowBuffer = require('buffer').SlowBuffer;
-
-        SlowBuffer.prototype.toString = original.SlowBufferToString;
-        SlowBuffer.prototype.write = original.SlowBufferWrite;
-
-        Buffer.isEncoding = original.BufferIsEncoding;
-        Buffer.byteLength = original.BufferByteLength;
-        Buffer.prototype.toString = original.BufferToString;
-        Buffer.prototype.write = original.BufferWrite;
-
-        if (iconv.supportsStreams) {
-            var Readable = require('stream').Readable;
-
-            Readable.prototype.setEncoding = original.ReadableSetEncoding;
-            delete Readable.prototype.collect;
-        }
-
-        original = undefined;
-    }
-}
diff --git a/node_modules/iconv-lite/lib/index.d.ts b/node_modules/iconv-lite/lib/index.d.ts
index 0547eb346..99f200f4a 100644
--- a/node_modules/iconv-lite/lib/index.d.ts
+++ b/node_modules/iconv-lite/lib/index.d.ts
@@ -6,15 +6,22 @@
  *--------------------------------------------------------------------------------------------*/
 
 declare module 'iconv-lite' {
+	// Basic API
 	export function decode(buffer: Buffer, encoding: string, options?: Options): string;
 
 	export function encode(content: string, encoding: string, options?: Options): Buffer;
 
 	export function encodingExists(encoding: string): boolean;
 
+	// Stream API
 	export function decodeStream(encoding: string, options?: Options): NodeJS.ReadWriteStream;
 
 	export function encodeStream(encoding: string, options?: Options): NodeJS.ReadWriteStream;
+
+	// Low-level stream APIs
+	export function getEncoder(encoding: string, options?: Options): EncoderStream;
+
+	export function getDecoder(encoding: string, options?: Options): DecoderStream;
 }
 
 export interface Options {
@@ -22,3 +29,13 @@ export interface Options {
     addBOM?: boolean;
     defaultEncoding?: string;
 }
+
+export interface EncoderStream {
+	write(str: string): Buffer;
+	end(): Buffer | undefined;
+}
+
+export interface DecoderStream {
+	write(buf: Buffer): string;
+	end(): string | undefined;
+}
diff --git a/node_modules/iconv-lite/lib/index.js b/node_modules/iconv-lite/lib/index.js
index 5391919ca..657701c38 100644
--- a/node_modules/iconv-lite/lib/index.js
+++ b/node_modules/iconv-lite/lib/index.js
@@ -1,7 +1,5 @@
 "use strict";
 
-// Some environments don't have global Buffer (e.g. React Native).
-// Solution would be installing npm modules "buffer" and "stream" explicitly.
 var Buffer = require("safer-buffer").Buffer;
 
 var bomHandling = require("./bom-handling"),
@@ -133,21 +131,50 @@ iconv.getDecoder = function getDecoder(encoding, options) {
     return decoder;
 }
 
+// Streaming API
+// NOTE: Streaming API naturally depends on 'stream' module from Node.js. Unfortunately in browser environments this module can add
+// up to 100Kb to the output bundle. To avoid unnecessary code bloat, we don't enable Streaming API in browser by default.
+// If you would like to enable it explicitly, please add the following code to your app:
+// > iconv.enableStreamingAPI(require('stream'));
+iconv.enableStreamingAPI = function enableStreamingAPI(stream_module) {
+    if (iconv.supportsStreams)
+        return;
+
+    // Dependency-inject stream module to create IconvLite stream classes.
+    var streams = require("./streams")(stream_module);
+
+    // Not public API yet, but expose the stream classes.
+    iconv.IconvLiteEncoderStream = streams.IconvLiteEncoderStream;
+    iconv.IconvLiteDecoderStream = streams.IconvLiteDecoderStream;
+
+    // Streaming API.
+    iconv.encodeStream = function encodeStream(encoding, options) {
+        return new iconv.IconvLiteEncoderStream(iconv.getEncoder(encoding, options), options);
+    }
 
-// Load extensions in Node. All of them are omitted in Browserify build via 'browser' field in package.json.
-var nodeVer = typeof process !== 'undefined' && process.versions && process.versions.node;
-if (nodeVer) {
-
-    // Load streaming support in Node v0.10+
-    var nodeVerArr = nodeVer.split(".").map(Number);
-    if (nodeVerArr[0] > 0 || nodeVerArr[1] >= 10) {
-        require("./streams")(iconv);
+    iconv.decodeStream = function decodeStream(encoding, options) {
+        return new iconv.IconvLiteDecoderStream(iconv.getDecoder(encoding, options), options);
     }
 
-    // Load Node primitive extensions.
-    require("./extend-node")(iconv);
+    iconv.supportsStreams = true;
+}
+
+// Enable Streaming API automatically if 'stream' module is available and non-empty (the majority of environments).
+var stream_module;
+try {
+    stream_module = require("stream");
+} catch (e) {}
+
+if (stream_module && stream_module.Transform) {
+    iconv.enableStreamingAPI(stream_module);
+
+} else {
+    // In rare cases where 'stream' module is not available by default, throw a helpful exception.
+    iconv.encodeStream = iconv.decodeStream = function() {
+        throw new Error("iconv-lite Streaming API is not enabled. Use iconv.enableStreamingAPI(require('stream')); to enable it.");
+    };
 }
 
 if ("Ā" != "\u0100") {
-    console.error("iconv-lite warning: javascript files use encoding different from utf-8. See https://github.com/ashtuchkin/iconv-lite/wiki/Javascript-source-file-encodings for more info.");
+    console.error("iconv-lite warning: js files use non-utf8 encoding. See https://github.com/ashtuchkin/iconv-lite/wiki/Javascript-source-file-encodings for more info.");
 }
diff --git a/node_modules/iconv-lite/lib/streams.js b/node_modules/iconv-lite/lib/streams.js
index 440955295..a1506482f 100644
--- a/node_modules/iconv-lite/lib/streams.js
+++ b/node_modules/iconv-lite/lib/streams.js
@@ -1,121 +1,109 @@
 "use strict";
 
-var Buffer = require("buffer").Buffer,
-    Transform = require("stream").Transform;
+var Buffer = require("safer-buffer").Buffer;
 
+// NOTE: Due to 'stream' module being pretty large (~100Kb, significant in browser environments), 
+// we opt to dependency-inject it instead of creating a hard dependency.
+module.exports = function(stream_module) {
+    var Transform = stream_module.Transform;
 
-// == Exports ==================================================================
-module.exports = function(iconv) {
-    
-    // Additional Public API.
-    iconv.encodeStream = function encodeStream(encoding, options) {
-        return new IconvLiteEncoderStream(iconv.getEncoder(encoding, options), options);
+    // == Encoder stream =======================================================
+
+    function IconvLiteEncoderStream(conv, options) {
+        this.conv = conv;
+        options = options || {};
+        options.decodeStrings = false; // We accept only strings, so we don't need to decode them.
+        Transform.call(this, options);
     }
 
-    iconv.decodeStream = function decodeStream(encoding, options) {
-        return new IconvLiteDecoderStream(iconv.getDecoder(encoding, options), options);
+    IconvLiteEncoderStream.prototype = Object.create(Transform.prototype, {
+        constructor: { value: IconvLiteEncoderStream }
+    });
+
+    IconvLiteEncoderStream.prototype._transform = function(chunk, encoding, done) {
+        if (typeof chunk != 'string')
+            return done(new Error("Iconv encoding stream needs strings as its input."));
+        try {
+            var res = this.conv.write(chunk);
+            if (res && res.length) this.push(res);
+            done();
+        }
+        catch (e) {
+            done(e);
+        }
     }
 
-    iconv.supportsStreams = true;
+    IconvLiteEncoderStream.prototype._flush = function(done) {
+        try {
+            var res = this.conv.end();
+            if (res && res.length) this.push(res);
+            done();
+        }
+        catch (e) {
+            done(e);
+        }
+    }
 
+    IconvLiteEncoderStream.prototype.collect = function(cb) {
+        var chunks = [];
+        this.on('error', cb);
+        this.on('data', function(chunk) { chunks.push(chunk); });
+        this.on('end', function() {
+            cb(null, Buffer.concat(chunks));
+        });
+        return this;
+    }
 
-    // Not published yet.
-    iconv.IconvLiteEncoderStream = IconvLiteEncoderStream;
-    iconv.IconvLiteDecoderStream = IconvLiteDecoderStream;
-    iconv._collect = IconvLiteDecoderStream.prototype.collect;
-};
 
+    // == Decoder stream =======================================================
 
-// == Encoder stream =======================================================
-function IconvLiteEncoderStream(conv, options) {
-    this.conv = conv;
-    options = options || {};
-    options.decodeStrings = false; // We accept only strings, so we don't need to decode them.
-    Transform.call(this, options);
-}
-
-IconvLiteEncoderStream.prototype = Object.create(Transform.prototype, {
-    constructor: { value: IconvLiteEncoderStream }
-});
-
-IconvLiteEncoderStream.prototype._transform = function(chunk, encoding, done) {
-    if (typeof chunk != 'string')
-        return done(new Error("Iconv encoding stream needs strings as its input."));
-    try {
-        var res = this.conv.write(chunk);
-        if (res && res.length) this.push(res);
-        done();
-    }
-    catch (e) {
-        done(e);
+    function IconvLiteDecoderStream(conv, options) {
+        this.conv = conv;
+        options = options || {};
+        options.encoding = this.encoding = 'utf8'; // We output strings.
+        Transform.call(this, options);
     }
-}
 
-IconvLiteEncoderStream.prototype._flush = function(done) {
-    try {
-        var res = this.conv.end();
-        if (res && res.length) this.push(res);
-        done();
-    }
-    catch (e) {
-        done(e);
-    }
-}
-
-IconvLiteEncoderStream.prototype.collect = function(cb) {
-    var chunks = [];
-    this.on('error', cb);
-    this.on('data', function(chunk) { chunks.push(chunk); });
-    this.on('end', function() {
-        cb(null, Buffer.concat(chunks));
+    IconvLiteDecoderStream.prototype = Object.create(Transform.prototype, {
+        constructor: { value: IconvLiteDecoderStream }
     });
-    return this;
-}
-
-
-// == Decoder stream =======================================================
-function IconvLiteDecoderStream(conv, options) {
-    this.conv = conv;
-    options = options || {};
-    options.encoding = this.encoding = 'utf8'; // We output strings.
-    Transform.call(this, options);
-}
-
-IconvLiteDecoderStream.prototype = Object.create(Transform.prototype, {
-    constructor: { value: IconvLiteDecoderStream }
-});
-
-IconvLiteDecoderStream.prototype._transform = function(chunk, encoding, done) {
-    if (!Buffer.isBuffer(chunk))
-        return done(new Error("Iconv decoding stream needs buffers as its input."));
-    try {
-        var res = this.conv.write(chunk);
-        if (res && res.length) this.push(res, this.encoding);
-        done();
-    }
-    catch (e) {
-        done(e);
+
+    IconvLiteDecoderStream.prototype._transform = function(chunk, encoding, done) {
+        if (!Buffer.isBuffer(chunk) && !(chunk instanceof Uint8Array))
+            return done(new Error("Iconv decoding stream needs buffers as its input."));
+        try {
+            var res = this.conv.write(chunk);
+            if (res && res.length) this.push(res, this.encoding);
+            done();
+        }
+        catch (e) {
+            done(e);
+        }
     }
-}
 
-IconvLiteDecoderStream.prototype._flush = function(done) {
-    try {
-        var res = this.conv.end();
-        if (res && res.length) this.push(res, this.encoding);                
-        done();
+    IconvLiteDecoderStream.prototype._flush = function(done) {
+        try {
+            var res = this.conv.end();
+            if (res && res.length) this.push(res, this.encoding);                
+            done();
+        }
+        catch (e) {
+            done(e);
+        }
     }
-    catch (e) {
-        done(e);
+
+    IconvLiteDecoderStream.prototype.collect = function(cb) {
+        var res = '';
+        this.on('error', cb);
+        this.on('data', function(chunk) { res += chunk; });
+        this.on('end', function() {
+            cb(null, res);
+        });
+        return this;
     }
-}
-
-IconvLiteDecoderStream.prototype.collect = function(cb) {
-    var res = '';
-    this.on('error', cb);
-    this.on('data', function(chunk) { res += chunk; });
-    this.on('end', function() {
-        cb(null, res);
-    });
-    return this;
-}
 
+    return {
+        IconvLiteEncoderStream: IconvLiteEncoderStream,
+        IconvLiteDecoderStream: IconvLiteDecoderStream,
+    };
+};
diff --git a/node_modules/iconv-lite/package.json b/node_modules/iconv-lite/package.json
index 07f6f1a8e..603426531 100644
--- a/node_modules/iconv-lite/package.json
+++ b/node_modules/iconv-lite/package.json
@@ -1,54 +1,52 @@
 {
-  "_from": "iconv-lite@~0.4.13",
-  "_id": "iconv-lite@0.4.23",
+  "_from": "iconv-lite@^0.6.2",
+  "_id": "iconv-lite@0.6.2",
   "_inBundle": false,
-  "_integrity": "sha512-neyTUVFtahjf0mB3dZT77u+8O0QB89jFdnBkd5P1JgYPbPaia3gXXOVL2fq8VyU2gMMD7SaN7QukTB/pmXYvDA==",
+  "_integrity": "sha512-2y91h5OpQlolefMPmUlivelittSWy0rP+oYVpn6A7GwVHNE8AWzoYOBNmlwks3LobaJxgHCYZAnyNo2GgpNRNQ==",
   "_location": "/iconv-lite",
   "_phantomChildren": {},
   "_requested": {
     "type": "range",
     "registry": true,
-    "raw": "iconv-lite@~0.4.13",
+    "raw": "iconv-lite@^0.6.2",
     "name": "iconv-lite",
     "escapedName": "iconv-lite",
-    "rawSpec": "~0.4.13",
+    "rawSpec": "^0.6.2",
     "saveSpec": null,
-    "fetchSpec": "~0.4.13"
+    "fetchSpec": "^0.6.2"
   },
   "_requiredBy": [
-    "/encoding",
-    "/external-editor"
+    "/encoding"
   ],
-  "_resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.23.tgz",
-  "_shasum": "297871f63be507adcfbfca715d0cd0eed84e9a63",
-  "_spec": "iconv-lite@~0.4.13",
-  "_where": "/Users/rebecca/code/npm/node_modules/encoding",
+  "_resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.2.tgz",
+  "_shasum": "ce13d1875b0c3a674bd6a04b7f76b01b1b6ded01",
+  "_spec": "iconv-lite@^0.6.2",
+  "_where": "/Users/isaacs/dev/npm/cli/node_modules/encoding",
   "author": {
     "name": "Alexander Shtuchkin",
     "email": "ashtuchkin@gmail.com"
   },
   "browser": {
-    "./lib/extend-node": false,
-    "./lib/streams": false
+    "stream": false
   },
   "bugs": {
     "url": "https://github.com/ashtuchkin/iconv-lite/issues"
   },
   "bundleDependencies": false,
   "dependencies": {
-    "safer-buffer": ">= 2.1.2 < 3"
+    "safer-buffer": ">= 2.1.2 < 3.0.0"
   },
   "deprecated": false,
   "description": "Convert character encodings in pure javascript.",
   "devDependencies": {
-    "async": "*",
-    "errto": "*",
-    "iconv": "*",
-    "istanbul": "*",
-    "mocha": "^3.1.0",
-    "request": "~2.81.0",
-    "semver": "*",
-    "unorm": "*"
+    "async": "^3.2.0",
+    "c8": "^7.2.0",
+    "errto": "^0.2.1",
+    "iconv": "^2.3.5",
+    "mocha": "^3.5.3",
+    "request": "^2.88.2",
+    "semver": "^6.3.0",
+    "unorm": "^1.6.0"
   },
   "engines": {
     "node": ">=0.10.0"
@@ -68,10 +66,9 @@
     "url": "git://github.com/ashtuchkin/iconv-lite.git"
   },
   "scripts": {
-    "coverage": "istanbul cover _mocha -- --grep .",
-    "coverage-open": "open coverage/lcov-report/index.html",
+    "coverage": "c8 _mocha --grep .",
     "test": "mocha --reporter spec --grep ."
   },
   "typings": "./lib/index.d.ts",
-  "version": "0.4.23"
+  "version": "0.6.2"
 }