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.