Split hyperf/serializer from hyperf/utils (#5663)

Co-authored-by: Deeka Wong <[email protected]>
Co-authored-by: 李铭昕 <[email protected]>

Author: huangdijia

tests/ClientTest.php

@@ -28,11 +28,11 @@
 use Hyperf\HttpServer\ResponseEmitter;
 use Hyperf\HttpServer\Router\DispatcherFactory;
 use Hyperf\HttpServer\Router\Router;
+use Hyperf\Serializer\SimpleNormalizer;
 use Hyperf\Server\Event;
 use Hyperf\Server\Server;
 use Hyperf\Testing\Client;
 use Hyperf\Utils\Filesystem\Filesystem;
-use Hyperf\Utils\Serializer\SimpleNormalizer;
 use HyperfTest\Testing\Stub\Exception\Handler\FooExceptionHandler;
 use HyperfTest\Testing\Stub\FooController;
 use Mockery;