* Fixed issue [#840](https://github.com/jakubpawlowicz/clean-css/issues/840) - allows input source map as map object.
* Fixed issue [#843](https://github.com/jakubpawlowicz/clean-css/issues/843) - regression in selector handling.
-[3.4.23 / 2016-xx-xx](https://github.com/jakubpawlowicz/clean-css/compare/v3.4.22...3.4)
+[3.4.23 / 2016-12-17](https://github.com/jakubpawlowicz/clean-css/compare/v3.4.22...v3.4.23)
==================
* Fixed issue [#844](https://github.com/jakubpawlowicz/clean-css/issues/844) - regression in property values extraction.