Cache类注释调整

library/think/Db.php

@@ -11,6 +11,7 @@
 
 namespace think;
 
+use think\db\Connection;
 use think\db\Query;
 use think\paginator\Collection as PaginatorCollection;
 
@@ -60,7 +61,7 @@ class Db
      * @access public
      * @param mixed         $config 连接配置
      * @param bool|string   $name 连接标识 true 强制重新连接
-     * @return \think\db\Connection
+     * @return Connection
      * @throws Exception
      */
     public static function connect($config = [], $name = false)