Merge pull request #105 from css-modules/greenkeeper-mocha-3.1.2

Update mocha to version 3.1.2 🚀

Author: markdalgleish

package.json

@@ -45,6 +45,6 @@
     "codecov.io": "^0.1.2",
     "coveralls": "^2.11.2",
     "eslint": "^1.5.0",
-    "mocha": "^2.2.5"
+    "mocha": "^3.1.2"
   }
 }