CHANGELOG.markdown in image_optim-0.22.1 vs CHANGELOG.markdown in image_optim-0.23.0

@@ -1,8 +1,18 @@
 # ChangeLog
 
 ## unreleased
 
+## v0.23.0 (2016-07-17)
+
+* Added `cache_dir` and `cache_worker_digests` options to cache results [#83](https://github.com/toy/image_optim/issues/83) [@gpakosz](https://github.com/gpakosz)
+* Should work on windows [#24](https://github.com/toy/image_optim/issues/24) [@toy](https://github.com/toy)
+* Rename `ImageOptim::ImagePath` to `ImageOptim::Path` and its method `#format` to `#image_format` [@toy](https://github.com/toy)
+* Ignore empty config files [#133](https://github.com/toy/image_optim/issues/133) [@toy](https://github.com/toy)
+* Use `FileUtils.move` in `ImagePath#replace` to rename file instead of copying on same device, don't preserve mtime and atime [#134](https://github.com/toy/image_optim/issues/134) [@toy](https://github.com/toy)
+* Make `:allow_lossy` an individual option for workers that can use it, so it will be in the list of worker options [#130](https://github.com/toy/image_optim/issues/130) [@toy](https://github.com/toy)
+* Use first 8 characters of sha1 hex for jpegrescan version [#131](https://github.com/toy/image_optim/issues/131) [@toy](https://github.com/toy)
+
 ## 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)