Merge pull request #94 from itsapi/greenkeeper/socket.io-2.1.0

fix(package): update socket.io to version 2.1.0

Author: geraintwhite

package.json

@@ -27,7 +27,7 @@
     "minimist": "^1.2.0",
     "node-static": "^0.7.7",
     "semver": "^5.1.0",
-    "socket.io": "~2.0.1",
+    "socket.io": "~2.1.0",
     "string-format": "~1.0.0"
   },
   "devDependencies": {