chore(package): update mocha to version 3.1.2 (#363)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -55,7 +55,7 @@
     "codecov.io": "0.1.6",
     "ghooks": "1.3.0",
     "in-publish": "^2.0.0",
-    "mocha": "3.1.1",
+    "mocha": "3.1.2",
     "node-uuid": "1.4.7",
     "nodemon": "1.11.0",
     "nyc": "6.6.1",