Update script-libp2p.js

[CocoonCrash]

Updated code to simply set srcObject to the MediaStream directly. https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL

[victorb]

Thanks! I think the last time I tried this, it wouldn't work in Chrome or Firefox. Can you confirm this works with both browsers?

[CocoonCrash]

Added 2 modifications:

• "src" changed to "srcObject": my bad
• Had to change the signaling server url as defaults changed and the former raised a multiaddress format error

Tests I run:

• Latest versions of Chrome/Edge: can run the webpage with the webcam image showing up, but peers communication doesn't work even if not reporting errors
• Latest version of Firefox: start to display the webpage but get killed...

Had no time to start debuging all the communication part based on libp2p