chore(package): update bluebird to version 3.5.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -25,7 +25,7 @@
   "license": "BSD",
   "dependencies": {
     "async": "1.4.2",
-    "bluebird": "3.4.7",
+    "bluebird": "3.5.0",
     "body-parser": "1.16.1",
     "colors": "1.0.3",
     "compression": "1.2.2",