chore(package): update request-promise to version 4.2.0 (#3648)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -64,7 +64,7 @@
     "jasmine-spec-reporter": "^3.1.0",
     "mongodb-runner": "3.4.0",
     "nodemon": "1.11.0",
-    "request-promise": "4.1.1"
+    "request-promise": "4.2.0"
   },
   "scripts": {
     "dev": "npm run build && node bin/dev",