chore(package): update mocha to version 3.4.0

Author: greenkeeper[bot]

package.json

@@ -24,7 +24,7 @@
     "coveralls": "^2.11.4",
     "eslint": "^3.1.1",
     "istanbul": "^0.4.1",
-    "mocha": "^3.0.0",
+    "mocha": "^3.4.0",
     "should": "^11.1.0"
   },
   "dependencies": {