Merge pull request rust-random#950 from coltfred/rand-chacha-0.2.2

Update changelog for rand-chacha 0.2.2

Merge pull request rust-random#929 from dhardy/master

Prepare rand 0.7.3 release

Merge pull request rust-random#900 from nox/bump-pcg

Update rand_pcg to 0.2.1

Merge pull request rust-random#888 from dhardy/master

Add value-stability tests

Merge pull request rust-random#887 from dhardy/master

Prepare rand 0.7.1

Merge pull request rust-random#884 from dhardy/master

Prepare rand_distr 0.2.2

Merge pull request rust-random#880 from vks/vigna2019

rand_xoshiro: Bump minor version

Merge pull request rust-random#873 from dhardy/master

Fixes regarding OsRng move

Merge pull request rust-random#864 from dhardy/error

Update rand_core::Error in line with getrandom::Error

Merge pull request rust-random#859 from newpavlov/patch-3

Fix rand_os