rand_xoshiro: Update changelog

Author: vks

rand_xoshiro/CHANGELOG.md

@@ -4,9 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [0.2.0] - 2019-05-24
-Fix `seed_from_u64(0)` for `Xoroshiro64StarStar` and `Xoroshiro64Star`. This
-breaks value stability for these generators if initialized with `seed_from_u64`.
+## [0.2.0] - 2019-05-28
+- Fix `seed_from_u64(0)` for `Xoroshiro64StarStar` and `Xoroshiro64Star`. This
+  breaks value stability for these generators if initialized with `seed_from_u64`.
+- Implement Serde support.
 
 ## [0.1.0] - 2019-01-04
 Initial release.