==================
* Fixed issue [#916](https://github.com/jakubpawlowicz/clean-css/issues/916) - maximum number of merged selectors.
+* Fixed issue [#908](https://github.com/jakubpawlowicz/clean-css/issues/908) - improved `minify` method signature.
* Fixed issue [#893](https://github.com/jakubpawlowicz/clean-css/issues/893) - `inline: false` as alias to `inline: 'none'`.
* Fixed issue [#890](https://github.com/jakubpawlowicz/clean-css/issues/890) - adds toggle to disable empty tokens removal.
* Fixed issue [#886](https://github.com/jakubpawlowicz/clean-css/issues/886) - better multi pseudo class / element merging.
* `removeEmpty` flag in level 1 optimizations controlling removal of rules and nested blocks;
* `removeEmpty` flag in level 2 optimizations controlling removal of rules and nested blocks;
* `compatibility: { selectors: { mergeLimit: <number> } }` flag in compatibility settings controlling maximum number of selectors in a single rule;
+* `minify` method improved signature accepting a list of hashes for a predictable traversal;
## Constructor options
* [@altschuler](https://github.com/altschuler) (Simon Altschuler) for fixing `@import` processing inside comments;
* [@ben-eb](https://github.com/ben-eb) (Ben Briggs) for sharing ideas about CSS optimizations;
* [@facelessuser](https://github.com/facelessuser) (Isaac) for pointing out a flaw in clean-css' stateless mode;
+* [@grandrath](https://github.com/grandrath) (Martin Grandrath) for improving `minify` method source traversal in ES6;
* [@jmalonzo](https://github.com/jmalonzo) (Jan Michael Alonzo) for a patch removing node.js' old `sys` package;
* [@lukeapage](https://github.com/lukeapage) (Luke Page) for suggestions and testing the source maps feature;
Plus everyone else involved in [#125](https://github.com/jakubpawlowicz/clean-css/issues/125) for pushing it forward;