Merge pull request #57 from neogeek/greenkeeper/mocha-4.0.1

chore(package): update mocha to version 4.0.1

Author: neogeek

package.json

@@ -25,7 +25,7 @@
     "codecov": "^2.2.0",
     "eslint": "^4.2.0",
     "istanbul": "^0.4.5",
-    "mocha": "^3.4.2"
+    "mocha": "^4.0.1"
   },
   "scripts": {
     "test": "npm run lint && mocha test/specs/",