Merge pull request #27 from gucong3000/greenkeeper/postcss-reporter-4.0.0

Update postcss-reporter to the latest version 🚀

Author: gucong3000

package.json

@@ -24,7 +24,7 @@
     "mocha": "^3.4.1",
     "nyc": "^11.0.1",
     "postcss-less": "^1.0.0",
-    "postcss-reporter": "^3.0.0",
+    "postcss-reporter": "^4.0.0",
     "postcss-selector-parser": "^2.2.3",
     "stylelint": "^7.10.1"
   },