chore(package): update dependencies

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -28,9 +28,9 @@
   "devDependencies": {
     "chai": "^3.5.0",
     "coffee-script": "^1.10.0",
-    "mocha": "^2.4.5",
-    "amqplib": "^0.4.2",
-    "mqtt": "1.4.x",
-    "msgflo": "^0.8.0"
+    "mocha": "^3.2.0",
+    "amqplib": "^0.5.1",
+    "mqtt": "~2.2.1",
+    "msgflo": "^0.9.5"
   }
 }