message: Fix for message batching not working.
diff: @@ -1169,7 +1169,7 @@ export class Container extends EventEmitterWithErrorHandling implements IContain
  loader,
  storage,
  (err) => this.raiseCriticalError(err),
  - (type, contents) => this.submitMessage(type, contents),
  + (type, contents, batch, metadata) => this.submitMessage(type, contents, batch, metadata),
  (message) => this.submitSignal(message),
  async (message) => this.snapshot(message),
  (reason?: string) => this.close(reason),
  