Prepare changelog for releasev2.1.0

1 files changed, 12 insertions, 2 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 01b67b6..e562f96 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,12 +12,22 @@ options. The project adheres to semantic versioning.
   when a positional argument could follow an option with an implicit value.
   For example, `--foo value`, where `foo` has an implicit value, will be
   parsed as `--foo=implicit` and a positional argument `value`.
-* Fixed an ambiguous overload in the `parse_positional` function when an
-  `initializer_list` was directly passed.
+* Boolean values are no longer special, but are just an option with a default
+  and implicit value.
+
+### Added
+
+* Added support for `std::optional` as a storage type.
+* Allow the help string to be customised.
+* Use `const` for the type in the `argv` parameter, since the contents of the
+  arguments is never modified.
 
 ### Bug Fixes
 
 * Building against GCC 4.9 was broken due to overly strict shadow warnings.
+* Fixed an ambiguous overload in the `parse_positional` function when an
+  `initializer_list` was directly passed.
+* Fixed precedence in the Boolean value regex.
 
 ## 2.0