发送消息，添加类型

application/chat/validate/ChatVerifyValidate.php

@@ -29,7 +29,7 @@ class ChatVerifyValidate extends Validate
         'target'      => 'require',
         'source'      => 'require|in:1,2,3',
         'is_user'     => 'require|in:0,1',
-        'type'        => 'require|in:1,2,3',
+        'type'        => 'require|in:1,2,3,4',
         'msg_content' => 'require',
         'from'        => 'require',
     ];