# 1.2.1

* Fixes an integration test failure with cssnano; use PostCSS `each` rather
  than native `forEach` (thanks to @TrySound).

# 1.2.0

* Improved duplicate detection (thanks to @TrySound).

# 1.1.6

* Improved performance by caching string representations of nodes, and
  minimising stringifying as much as possible (thanks to @TrySound).

# 1.1.5

* Fixed an issue where comments were being deduplicated.

# 1.1.4

* Improved performance by making all AST iterations in a single pass.

# 1.1.3

* Improved documentation for compatibility with the plugin guidelines.
* Simplify main source code.

# 1.1.2

* Fixed an issue where declarations inside similar keyframes were being
  discarded incorrectly.

# 1.1.1

* Fixed a bug where keyframe rules were being incorrectly discarded, if they had
  the same declarations but different vendor prefixes.

# 1.1.0

* Now uses the PostCSS `4.1` plugin API.

# 1.0.0

* Initial release.
