package: bump socket.io for security improvements

Author: rauchg

package.json

@@ -22,7 +22,7 @@
     "gulp-rimraf": "0.2.0",
     "hostenv": "1.0.1",
     "opentype.js": "0.4.4",
-    "socket.io": "1.4.4",
+    "socket.io": "1.4.8",
     "superagent": "0.21.0",
     "vd": "0.1.0"
   },