CHANGELOG.md in jekyll-postcss-0.2.1 vs CHANGELOG.md in jekyll-postcss-0.2.2

@@ -1,6 +1,10 @@
 # Changelog
 
+## 0.2.2
+
+- Use `Array.unshift` instead of `Array.prepend` to support older Ruby versions
+
 ## 0.2.1
 
 - Recompile when CSS imports change
 
 ## 0.2.0