dependencies: updated measured 1.1.0 -> measured-core 1.11.2

When installing dependencies, npm informed us that measured had been deprecated,
and renamed to measured-core. Let's follow the advice, and get rid of the
warning.

  npm WARN deprecated measured@1.1.0: This package has been renamed to
  measured-core, all versions of measured have been re-released under
  measured-core, please update your package and consider updating to the newest
  version. See https://github.com/yaorg/node-measured for latest updates.

This package is used to expose a single endpoint ("/stats"), whose output does
not change after this commit.

Fixes #3458

src/node/stats.js

@@ -1,3 +1,3 @@
-var measured = require('measured')
+var measured = require('measured-core')
 
 module.exports = measured.createCollection();

src/package.json

@@ -43,7 +43,7 @@
     "jsonminify": "0.4.1",
     "languages4translatewiki": "0.1.3",
     "log4js": "0.6.35",
-    "measured": "1.1.0",
+    "measured-core": "1.11.2",
     "npm": ">=4.0.2",
     "request": "2.83.0",
     "resolve": "1.1.7",