Swap wrtc for node-datachannel

[feross]

I'd love to see someone swap out wrtc for node-datachannel and report how it works out. If it looks good, please send a PR and we can use this implementation instead.

node-datachannel uses libdatachannel under the hood which is what's used for the WebTorrent support in libtorrent, so it likely works well :)

It may fix the performance issues noted in many issues in this repo, e.g. #58 #67

[github-actions]

Is this still relevant? If so, what is blocking it? Is there anything you can do to help move it forward?

[alxhotel]

Linking to #120 (comment) to report why this issue is now temporally closed