Bump metrics from 1.3.0 to 1.8.1

services/filestore/package.json

@@ -30,7 +30,7 @@
     "heapdump": "^0.3.2",
     "knox": "~0.9.1",
     "logger-sharelatex": "git+https://github.com/sharelatex/logger-sharelatex.git#v1.1.0",
-    "metrics-sharelatex": "git+https://github.com/sharelatex/metrics-sharelatex.git#v1.3.0",
+    "metrics-sharelatex": "git+https://github.com/sharelatex/metrics-sharelatex.git#v1.8.1",
     "node-transloadit": "0.0.4",
     "node-uuid": "~1.4.1",
     "pngcrush": "0.0.3",