upgrade request to latest version

services/document-updater/package.json

@@ -28,7 +28,7 @@
     "metrics-sharelatex": "^2.2.0",
     "mongojs": "^2.6.0",
     "redis-sharelatex": "^1.0.11",
-    "request": "2.47.0",
+    "request": "^2.47.0",
     "requestretry": "^1.12.0",
     "settings-sharelatex": "^1.1.0"
   },