fix to wrong peerId in event

src/PeerManager.ts

@@ -269,7 +269,7 @@ export class PeerManager {
     let peerConnection = new PeerConnection(this, remotePeerID, this.websocketSendPeerMessage.bind(this));
     this.peers.set(remotePeerID, peerConnection);
     await peerConnection.connect();
-    this.onPeerConnected(this.peerID);
+    this.onPeerConnected(remotePeerID);
     return peerConnection;
   }