Method OnProgress

test/async_progress_worker.cc:202–214

  }

  void OnProgress(const ProgressData* data, size_t /* count */) override {
    Napi::Env env = Env();
    if (!_progress.IsEmpty()) {
      Number progress = Number::New(env, data->progress);
      _progress.MakeCallback(Receiver().Value(), {progress});
    }

    {
      std::lock_guard<std::mutex> lk(_cvm);
      dataSent = true;
      _cv.notify_one();
    }
  }

 private:
  TestWorker(Function cb,