Bumps clean-css dependency to version 4.2.1.

Author: jakubpawlowicz

History.md

@@ -1,3 +1,8 @@
+[4.3.0-pre / 2019-xx-xx](https://github.com/jakubpawlowicz/clean-css-cli/compare/4.2...HEAD)
+==================
+
+* Bumps clean-css dependency to 4.2.1.
+
 [4.2.0 / 2018-08-02](https://github.com/jakubpawlowicz/clean-css-cli/compare/4.1...v4.2.0)
 ==================
 

package.json

@@ -33,7 +33,7 @@
   ],
   "homepage": "https://github.com/jakubpawlowicz/clean-css-cli#readme",
   "dependencies": {
-    "clean-css": "^4.2.0",
+    "clean-css": "^4.2.1",
     "commander": "2.x",
     "glob": "7.x"
   },