updated demo with fix using older sdk version.
updated demo with fix using older sdk version.

stephenlb/webrtc-sdk,stephenlb/webrtc-sdk,arielgk/webrtc-sdk,stephenlb/webrtc-sdk,pubnub/webrtc,arielgk/webrtc-sdk,pubnub/webrtc,pubnub/webrtc,arielgk/webrtc-sdk