Use v1.6.0 of metrics

services/web/package.json

@@ -35,7 +35,7 @@
     "lynx": "0.1.1",
     "marked": "^0.3.5",
     "method-override": "^2.3.3",
-    "metrics-sharelatex": "git+https://github.com/sharelatex/metrics-sharelatex.git#v1.3.0",
+    "metrics-sharelatex": "git+https://github.com/sharelatex/metrics-sharelatex.git#v1.6.0",
     "mimelib": "0.2.14",
     "mocha": "1.17.1",
     "mongojs": "0.18.2",