Backports correct decimal point regex from 5.x branch.

See 9d633cb.

Author: jakubpawlowicz

History.md

@@ -2,6 +2,7 @@
 ==================
 
 * Backports prototype pollution fix from 5.x branch.
+* Backports correct decimal point regex from 5.x branch.
 
 [4.2.3 / 2020-01-28](https://github.com/jakubpawlowicz/clean-css/compare/v4.2.2...v4.2.3)
 ==================

lib/optimizer/level-1/optimize.js

@@ -606,7 +606,7 @@ function buildPrecisionOptions(roundingPrecision) {
 
   if (optimizable.length > 0) {
     precisionOptions.enabled = true;
-    precisionOptions.decimalPointMatcher = new RegExp('(\\d)\\.($|' + optimizable.join('|') + ')($|\W)', 'g');
+    precisionOptions.decimalPointMatcher = new RegExp('(\\d)\\.($|' + optimizable.join('|') + ')($|\\W)', 'g');
     precisionOptions.zeroMatcher = new RegExp('(\\d*)(\\.\\d+)(' + optimizable.join('|') + ')', 'g');
   }