Bumps the sdp-simulcast version.

package.json

     "pako": "*",
     "retry": "0.6.1",
     "sdp-interop": "0.1.11",
-    "sdp-simulcast": "0.1.3",
+    "sdp-simulcast": "0.1.4",
     "sdp-transform": "1.5.*",
     "socket.io-client": "1.3.6",
     "strophe": "^1.2.2",