message: fix map handling
diff: @@ -352,7 +352,7 @@ export default class JsonOCPPServer extends OCPPServer {
  return;
  }
  // Unlock
  - delete this.runningWSRequestsMessages[wsWrapper.url];
  + this.runningWSRequestsMessages.delete(wsWrapper.url);
  }
  private async onMessage(ws: uWS.WebSocket, message: string, isBinary: boolean): Promise<void> {
  