update to v2.0.0-b4 version

change global.php config load time and logic
set context get server function available more time
delete unused comment and @CQAPISend
@CQCommand add start_with and end_with
set exceptions extended by ZMException
rename @SwooleSetup to @ZMSetup
fix quotes for global.php
fix LightCache empty presistence_path error
remove RemoteShell

src/ZM/Context/Context.php

@@ -28,7 +28,7 @@ class Context implements ContextInterface
     /**
      * @return swoole_server|null
      */
-    public function getServer() { return self::$context[$this->cid]["server"] ?? null; }
+    public function getServer() { return self::$context[$this->cid]["server"] ?? server(); }
 
     /**
      * @return Frame|null