CHANGELOG.markdown in image_optim-0.22.0 vs CHANGELOG.markdown in image_optim-0.22.1

@@ -1,8 +1,15 @@
 # ChangeLog
 
 ## unreleased
 
+## v0.22.1 (2016-02-21)
+
+* Fix missing old (1.x) `pngquant` version as it was output to stderr [#123](https://github.com/toy/image_optim/issues/123) [@toy](https://github.com/toy)
+* Fix capturing wrong version of `pngcrush` when it complains about different png.h and png.c [#122](https://github.com/toy/image_optim/issues/122) [@toy](https://github.com/toy)
+* Add support for `sprockets-rails` 3.x, kudos to [@iggant](https://github.com/iggant) and [@valff](https://github.com/valff) for initial PRs [#120](https://github.com/toy/image_optim/pull/120) [#121](https://github.com/toy/image_optim/pull/121) [#126](https://github.com/toy/image_optim/pull/126) [@toy](https://github.com/toy)
+* Use rubocop ~> 0.37 [@toy](https://github.com/toy)
+
 ## v0.22.0 (2015-11-21)
 
 * Unify getting description of option default value using `default_description` [@toy](https://github.com/toy)
 * Don't use `-strip` option for optipng when the bin version is less than 0.7 [#106](https://github.com/toy/image_optim/issues/106) [@toy](https://github.com/toy)
 * Use quality `0..100` by default in lossy mode of pngquant worker [#77](https://github.com/toy/image_optim/issues/77) [@toy](https://github.com/toy)