4.0.0-rc.0

• Breaking: Drops support for Node 0.12, we now require at least Node 4.
• Breaking: Update PostCSS to 6.0.0.

 2.1.0

• postcss-discard-empty will now report the rules that were removed
  (thanks to @duncanbeevers).

2.0.1

• Now compiled with babel 6.

2.0.0

• Upgraded to PostCSS 5.

1.1.2

• Increased performance by iterating the AST in a single pass
  (thanks to @andyjansson).

1.1.1

• Tweaks for compatibility with the plugin guidelines.

1.1.0

• Now uses the PostCSS 4.1 plugin API.

1.0.0

• Initial release.