Adapt swoole 5.0 by removing swoole classes with PSR-0. (#4406)

* Removed swoole classes with `PSR-0`

* Update CHANGELOG-2.2.md

CHANGELOG-2.2.md

@@ -4,6 +4,10 @@
 
 - [#4399](https://github.com/hyperf/hyperf/pull/4399) Fixed bug that `Redis::scan` does not work when using redis cluster.
 
+## Optimized
+
+- [#4406](https://github.com/hyperf/hyperf/pull/4406) Adapt swoole 5.0 by removing swoole classes with `PSR-0`.
+
 # v2.2.21 - 2021-12-20
 
 ## Fixed

src/grpc-client/src/BaseClient.php

@@ -18,6 +18,7 @@ use Hyperf\GrpcClient\Exception\GrpcClientException;
 use Hyperf\Utils\ApplicationContext;
 use Hyperf\Utils\ChannelPool;
 use InvalidArgumentException;
+use Swoole\Http2\Response;
 
 /**
  * @method int send(Request $request)
@@ -91,7 +92,7 @@ class BaseClient
      * @param Message $argument The argument to the method
      * @param callable $deserialize A function that deserializes the response
      * @throws GrpcClientException
-     * @return array|\Google\Protobuf\Internal\Message[]|\swoole_http2_response[]
+     * @return array|\Google\Protobuf\Internal\Message[]|Response[]
      */
     protected function _simpleRequest(
         string $method,