6.0.0

• Breaking: Updated PostCSS from v5.x to v6.x, and reduce-css-calc from v1.x
  to v2.x (thanks to @andyjansson).

5.3.1

• Fixed: avoid security issue related to reduce-css-calc@< 1.2.4.

5.3.0

• Added: support for selector transformation via selectors option.
  (#29 - @uniquegestaltung)

5.2.1

• Fixed: support for multiline value
  (#27)

5.2.0

• Added: "mediaQueries" option for @media support
  (#22)

5.1.0

• Added: "warnWhenCannotResolve" option to warn when calc() are not reduced to a single value

5.0.0

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

4.1.0

• Added: compatibility with postcss v4.1.x (#12)

4.0.1

• Fixed: preserve option does not create duplicated values (#7)

4.0.0

• Added: compatibility with postcss v4.x
• Changed: partial compatiblity with postcss v3.x (stack traces have lost filename)