Selector Parser v5

https://github.com/postcss/postcss-selector-parser/blob/master/CHANGELOG.md#500

Handle Selector groups

Groups of css selectors that are logically the same will now be combined (#247 thanks @r-wettstaedt!)

.one .two, .one .three {} .one .three, .one .two {}
/* becomes */
.one .two, .one .three {}

Postcss 7

Remove Node.js 9 and Node.js 4 support
Remove IE and “dead” browsers support

https://github.com/postcss/postcss/blob/master/CHANGELOG.md#70-president-amy

Postcss Selector Parser 4

v5.0.0

5.0.0

Update CLI usage documentation

Documentation has been updated to reflect new PostCSS command line usage. (#148 thanks to @ItsEddie)

nested @font-face changes

When using postcss-combine-duplicated-selectors with postcss-nested selectors, @font-face now bubbles to the top level, changing how selectors will be combined.
See: https://github.com/postcss/postcss-nested/blob/master/CHANGELOG.md#30

Upgrade commit message checker

v3.1.2

3.1.2

Upgrade testing libraries

v3.1.1

3.1.1

Upgrade postcss selector parser

No new features in postcss-combine-duplicated-selectors, just improvements in the underlying technology.

Re-add Node 6 Support

Explicit Node.js version 6 support has been re-added to package.json engines