chore(package): update mocha to version 3.0.2

Author: greenkeeperio-bot

package.json

@@ -60,7 +60,7 @@
     "es6-shim": "^0.35.1",
     "http-server": "^0.9.0",
     "istanbul": "^0.4.3",
-    "mocha": "^2.5.3",
+    "mocha": "^3.0.2",
     "npm-run-all": "^3.0.0"
   },
   "engines": {