Merge branch 'master' into greenkeeper/mqtt-2.13.0

Author: jonnor

package.json

@@ -19,10 +19,10 @@
   "dependencies": {},
   "devDependencies": {
     "amqplib": "^0.5.1",
-    "chai": "~4.1.0",
+    "chai": "^4.1.0",
     "coffee-script": "^1.8.0",
-    "mocha": "~3.3.0",
-    "mqtt": "~2.13.0",
+    "mocha": "^4.0.1",
+    "mqtt": "^2.13.0",
     "msgflo": "^0.10.0"
   },
   "keywords": [],