CHANGELOG.markdown in image_optim-0.24.1 vs CHANGELOG.markdown in image_optim-0.24.2

@@ -1,8 +1,13 @@
 # ChangeLog
 
 ## unreleased
 
+## v0.24.2 (2017-02-18)
+
+* Describe `nice` level option [#140](https://github.com/toy/image_optim/issues/140) [@toy](https://github.com/toy)
+* Add instruction for installing `pngout` using brew [#143](https://github.com/toy/image_optim/pull/143) [@lukaselmer](https://github.com/lukaselmer)
+
 ## v0.24.1 (2016-11-20)
 
 * Use `image_size ~> 1.5` with `apng` detection, so apng images are not optimised to one frame version [#142](https://github.com/toy/image_optim/issues/142) [@toy](https://github.com/toy)
 * Don't show `?` for unknown bin version in message about inability to determine version [@toy](https://github.com/toy)
 * Deduplicate bin resolving error messages [@toy](https://github.com/toy)