CHANGELOG.markdown in image_optim-0.19.1 vs CHANGELOG.markdown in image_optim-0.20.0

@@ -1,8 +1,14 @@
 # ChangeLog
 
 ## unreleased
 
+## v0.20.0 (2014-12-15)
+
+* Ignore and show warning for lossy options `jpegoptim#max_quality` and `pngquant#quality` in default/lossless mode [#71](https://github.com/toy/image_optim/issues/71) [@toy](https://github.com/toy)
+* Add `:blacken` option to `pngcrush` worker, to blacken fully transparent pixels, on by default [@toy](https://github.com/toy)
+* Command line option `--no-progress` to disable showing progress of optimizing images [@toy](https://github.com/toy)
+
 ## v0.19.1 (2014-11-22)
 
 * Blacklist pngcrush 1.7.80 as it loses one color in indexed images [@toy](https://github.com/toy)
 
 ## v0.19.0 (2014-11-08)