4.0.0

• Added: compatibility with postcss v6.x
• Updated dependencies

3.0.1

• Bump color dependency version
  (@kenany)

3.0.0

• Added: compatibility with postcss v5.x
• Removed: compatiblity with postcss v4.x

2.0.0

• Added: compatibility with postcss v4.x
• Removed: compatiblity with postcss v3.x