RTCMultiConnection-v2.1.8 added.

-. sync:false added for "connection.streams['streamid'].mute" method.

-. Ref:
https://trello.com/c/zAr3yFXg/60-sync-false-added-for-mute-method

-.
updated: connection.mediaConstraints = { video: videoConstraints, audio:
audioConstraints };
-. Ref:
https://trello.com/c/BHDoAb93/59-connection-mediaconstraints-is-prioritized-over-connection-session

-.
"onstreamended" fixed. Ref:
https://trello.com/c/7MpMLJgY/58-onstreamended-fixed