chore(package): update request-promise to version 4.1.0 (#2426)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -41,7 +41,7 @@
     "pg-promise": "5.2.7",
     "redis": "2.6.2",
     "request": "2.74.0",
-    "request-promise": "4.0.1",
+    "request-promise": "4.1.0",
     "semver": "^5.2.0",
     "tv4": "1.2.7",
     "winston": "2.2.0",