Merge pull request #2316 from tripu/master

Update “debug” to avoid vulnerability in “ms”

Author: nkzawa

package.json

@@ -26,7 +26,7 @@
     "socket.io-client": "automattic/socket.io-client#master",
     "socket.io-adapter": "automattic/socket.io-adapter#master",
     "has-binary": "0.1.7",
-    "debug": "2.1.3"
+    "debug": "2.2.0"
   },
   "devDependencies": {
     "expect.js": "0.3.1",