ensure that 'peer' is emitted before 'connect' event fires

This is just a defensive code change to ensure that if signal() were somehow able to cause the peer to synchronously emit the 'connect' event that we won't cause the 'error' listener to be unregistered before 'peer' is emitted and the user has a chance to register their own 'error' listener

Author: feross

lib/client/websocket-tracker.js

@@ -278,17 +278,17 @@ class WebSocketTracker extends Tracker {
         if (this._trackerId) params.trackerid = this._trackerId
         this._send(params)
       })
-      peer.signal(data.offer)
       this.client.emit('peer', peer)
+      peer.signal(data.offer)
     }
 
     if (data.answer && data.peer_id) {
       const offerId = common.binaryToHex(data.offer_id)
       peer = this.peers[offerId]
       if (peer) {
         peer.id = common.binaryToHex(data.peer_id)
-        peer.signal(data.answer)
         this.client.emit('peer', peer)
+        peer.signal(data.answer)
 
         clearTimeout(peer.trackerTimeout)
         peer.trackerTimeout = null