chore(package): update request to version 2.73.0 (#2242)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -40,7 +40,7 @@
     "parse-server-simple-mailgun-adapter": "1.0.0",
     "pg-promise": "5.1.0",
     "redis": "2.6.2",
-    "request": "2.72.0",
+    "request": "2.73.0",
     "request-promise": "3.0.0",
     "tv4": "1.2.7",
     "winston": "2.2.0",