fix: ensure signal connect future is reset after disconnecting from room (livekit#1533)

Author: lukasIO

.changeset/cold-bags-dance.md

@@ -0,0 +1,5 @@
+---
+"livekit-client": patch
+---
+
+fix: ensure signal connect future is reset after disconnecting from room

src/room/participant/LocalParticipant.ts

@@ -260,6 +260,8 @@ export default class LocalParticipant extends Participant {
       .on(EngineEvent.Disconnected, this.handleDisconnected)
       .on(EngineEvent.SignalRequestResponse, this.handleSignalRequestResponse)
       .on(EngineEvent.DataPacketReceived, this.handleDataPacket);
+
+    this.signalConnectedFuture = undefined;
   }
 
   private handleReconnecting = () => {