Merge pull request css-modules#173 from css-modules/greenkeeper-mocha-3.1.2

Update mocha to version 3.1.2 🚀

Author: geelen

package.json

@@ -20,7 +20,7 @@
     "babelify": "6.4.0",
     "chokidar-cli": "1.1.0",
     "eslint": "3.9.1",
-    "mocha": "3.0.2"
+    "mocha": "3.1.2"
   },
   "scripts": {
     "lint": "eslint src",