message: Convert to namespace.
diff: @@ -104,7 +104,7 @@ go(function () {
  // http2
  $http2_client = new Swoole\Coroutine\Http2\Client('localhost', 9501);
  $http2_client->connect();
  - $http2_request = new swoole_http2_request;
  + $http2_request = new Swoole\Http2\Reuqest;
  $http2_request->method = 'POST';
  $http2_request->data = 'Swoole Http2';
  $http2_client->send($http2_request);
  