fix: use node-datachannel WebRTC polyfill (#2306)

node-datachannel has shipped a WebRTC polyfill for the last few versions
so use that instead of our own version.

Refs: murat-dogan/node-datachannel#185

Author: achingbrain

packages/transport-webrtc/package.json

@@ -67,7 +67,7 @@
     "it-to-buffer": "^4.0.2",
     "multiformats": "^12.1.3",
     "multihashes": "^4.0.3",
-    "node-datachannel": "^0.5.0-dev",
+    "node-datachannel": "^0.5.3",
     "p-defer": "^4.0.0",
     "p-event": "^6.0.0",
     "p-timeout": "^6.1.2",

packages/transport-webrtc/src/webrtc/index.ts

@@ -1,11 +1,6 @@
 import node from 'node-datachannel'
-import { IceCandidate } from './rtc-ice-candidate.js'
-import { PeerConnection } from './rtc-peer-connection.js'
-import { SessionDescription } from './rtc-session-description.js'
 
-export { SessionDescription as RTCSessionDescription }
-export { IceCandidate as RTCIceCandidate }
-export { PeerConnection as RTCPeerConnection }
+export { RTCSessionDescription, RTCIceCandidate, RTCPeerConnection } from 'node-datachannel/polyfill'
 
 export function cleanup (): void {
   node.cleanup()