update to 2.1.0 version

add @OnCloseEvent, @OnOpenEvent, @OnMessageEvent, @OnRequestEvent
update EventDispatcher.php and change it to status-based schema
fix @CQBefore bugs

src/ZM/Annotation/Swoole/OnRequestEvent.php

@@ -0,0 +1,17 @@
+<?php
+
+
+namespace ZM\Annotation\Swoole;
+
+
+use Doctrine\Common\Annotations\Annotation\Target;
+
+/**
+ * @Annotation
+ * @Target("METHOD")
+ * Class OnRequestEvent
+ * @package ZM\Annotation\Swoole
+ */
+class OnRequestEvent extends OnSwooleEventBase
+{
+}