chore(package): update mocha to version 3.0.1

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -47,6 +47,6 @@
     "coveralls": "^2.11.2",
     "css-selector-parser": "^1.0.4",
     "eslint": "^1.5.0",
-    "mocha": "^2.2.5"
+    "mocha": "^3.0.1"
   }
 }