add cs fixer and PHPStan and activate it (build 436)

src/ZM/Annotation/Swoole/OnCloseEvent.php

@@ -1,21 +1,20 @@
 <?php
 
+declare(strict_types=1);
 
 namespace ZM\Annotation\Swoole;
 
-
 use Doctrine\Common\Annotations\Annotation\Target;
 
 /**
  * @Annotation
  * @Target("METHOD")
  * Class OnCloseEvent
- * @package ZM\Annotation\Swoole
  */
 class OnCloseEvent extends OnSwooleEventBase
 {
     /**
      * @var string
      */
-    public $connect_type = "default";
-}
+    public $connect_type = 'default';
+}