CHANGELOG.md in lite-ruby-1.0.21 vs CHANGELOG.md in lite-ruby-1.0.22

@@ -4,9 +4,13 @@
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
+## [1.0.22] - 2020-04-11
+### Fixed
+- Fixed reverse_merge! on a frozen hash
+
 ## [1.0.21] - 2019-11-02
 ### Added
 - Added Enumerable => `excluding`
 - Added Enumerable => `including`
 - Added Enumerable => `pluck`