Merge pull request #16 from msgflo/greenkeeper/mqtt-2.13.0

chore(package): update mqtt to version 2.13.0

Author: jonnor

package.json

@@ -30,7 +30,7 @@
     "coffee-script": "^1.10.0",
     "mocha": "^4.0.0",
     "amqplib": "^0.5.1",
-    "mqtt": "~2.9.3",
+    "mqtt": "^2.13.0",
     "msgflo": "^0.10.19"
   }
 }