chore(package): update mocha to version 2.5.2 (#244)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -54,7 +54,7 @@
     "chai": "3.5.0",
     "codecov.io": "0.1.6",
     "ghooks": "1.2.1",
-    "mocha": "2.4.5",
+    "mocha": "2.5.2",
     "node-uuid": "1.4.7",
     "nodemon": "1.9.1",
     "nyc": "6.4.4",