chore(package): update mocha to version 5.0.1

Closes #38

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "dodo": "^0.0.14",
     "express": "^4.12.0",
     "istanbul": "^0.4.0",
-    "mocha": "3.4.2",
+    "mocha": "5.0.1",
     "sinon": "^4.0.0"
   },
   "peerDependencies": {