fix(package): update request to version 2.81.0

https://greenkeeper.io/

package.json

@@ -119,7 +119,7 @@
     "recaptcha-promise": "0.1.2",
     "reconnecting-websocket": "3.0.3",
     "redis": "2.6.5",
-    "request": "2.80.0",
+    "request": "2.81.0",
     "rimraf": "2.6.1",
     "riot": "3.3.2",
     "riot-tag-loader": "1.0.0",