Updates socket.io version to callstats recommended version.

package.json

@@ -25,7 +25,7 @@
     "sdp-interop": "0.1.11",
     "sdp-simulcast": "0.1.7",
     "sdp-transform": "1.5.*",
-    "socket.io-client": "1.3.6",
+    "socket.io-client": "1.4.5",
     "strophe": "^1.2.2",
     "strophejs-plugins": "^0.0.6"
   },