message: Fix test (due to defer close)
diff: @@ -27,7 +27,7 @@ $timer_id = Swoole\Timer::tick(1000 / MAX_CONCURRENCY_MID, function () use (&$ma
  });
  go(function () use ($timer_id, &$map) {
  - co::sleep(1);
  + Co::sleep(1);
  Swoole\Timer::clear($timer_id);
  $redis = new Redis();
  $redis->connect(REDIS_SERVER_HOST, REDIS_SERVER_PORT);
  @@ -35,7 +35,8 @@ go(function () use ($timer_id, &$map) {
  phpt_var_dump($info);
  Assert::same($info['connected_clients'], count($map) + 1, var_dump_return($info));
  $map = []; // destruct
  - usleep(100);
  + Co::sleep(0.001); // defer close
  + switch_process();
  $info = (array)$redis->info('clients');
  phpt_var_dump($info);
  Assert::same($info['connected_clients'], 1, var_dump_return($info));
  