Merge pull request #28 from msgflo/greenkeeper/mocha-4.0.1

chore(package): update mocha to version 4.0.1

Author: jonnor

package.json

@@ -19,9 +19,9 @@
   "dependencies": {},
   "devDependencies": {
     "amqplib": "^0.5.1",
-    "chai": "~4.1.0",
+    "chai": "^4.1.0",
     "coffee-script": "^1.8.0",
-    "mocha": "~3.3.0",
+    "mocha": "^4.0.1",
     "mqtt": "~1.4.0",
     "msgflo": "^0.10.0"
   },