chore(package): update mocha to version 3.0.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -61,7 +61,7 @@
     "json-loader": "^0.5.4",
     "less": "^2.7.1",
     "less-loader": "^2.2.3",
-    "mocha": "^2.5.3",
+    "mocha": "^3.0.0",
     "moment": "^2.14.1",
     "npm": "^3.3.4",
     "numbro": "^1.9.1",