* Fixed issue [#861](https://github.com/jakubpawlowicz/clean-css/issues/861) - new `transition` property optimizer.
* Fixed issue [#895](https://github.com/jakubpawlowicz/clean-css/issues/895) - ignoring specific styles.
* Fixed issue [#947](https://github.com/jakubpawlowicz/clean-css/issues/947) - selector based filtering.
+* Fixed issue [#1038](https://github.com/jakubpawlowicz/clean-css/issues/1038) - `font-variation-settings` quoting.
* Fixes ReDOS vulnerabilities in validator code.
[4.1.11 / 2018-03-06](https://github.com/jakubpawlowicz/clean-css/compare/v4.1.10...v4.1.11)