deps: bump rand and quickcheck

... to 0.6 and 0.8, respectively.

We aren't running tests on the MSRV any more any way, so we might as
well keep on moving.

Unfortunately, the rand ecosystem refuses to advertise and maintain
correct minimal versions in their Cargo.toml, so we have to remove the
minimal version check.

1 files changed, 2 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 7755a17..f3bdf31 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,4 +32,6 @@ quickcheck = { version = "0.8", default-features = false }
 rand = "0.6"
 serde = "1"
 serde_derive = "1"
+quickcheck = { version = "0.8.2", default-features = false }
+rand = "0.6.5"
 doc-comment = "0.3"