CHANGELOG.markdown in image_optim-0.21.0 vs CHANGELOG.markdown in image_optim-0.22.0

@@ -1,8 +1,16 @@
 # ChangeLog
 
 ## unreleased
 
+## 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)
+* Add `:disable_plugins` and `:enable_plugins` options to `svgo` worker [#110](https://github.com/toy/image_optim/pull/110) [@tomhughes](https://github.com/tomhughes)
+* Allow setting config in rails like `config.assets.image_optim.name = value` [#111](https://github.com/toy/image_optim/pull/111) [@toy](https://github.com/toy)
+
 ## v0.21.0 (2015-05-30)
 
 * Use exifr 1.2.2 with fix for a bug [#85](https://github.com/toy/image_optim/issues/85) [@toy](https://github.com/toy)
 * Change order of png workers according to analysis to pngcrush, optipng, pngquant, pngout, advpng (was pngquant, pngcrush, pngout, advpng, optipng) [@toy](https://github.com/toy)
 * Run worker command without invoking shell (except ruby < 1.9 and jruby) [@toy](https://github.com/toy)