Fixed test cases (#7643)

Author: limingxinleo

src/Model/Model.php

@@ -29,6 +29,7 @@
 use JsonSerializable;
 use Psr\EventDispatcher\EventDispatcherInterface;
 use Psr\EventDispatcher\StoppableEventInterface;
+use Stringable;
 use Throwable;
 
 use function Hyperf\Collection\collect;
@@ -40,7 +41,7 @@
 /**
  * @mixin ModelIDE
  */
-abstract class Model implements ArrayAccess, Arrayable, Jsonable, JsonSerializable, CompressInterface
+abstract class Model implements Stringable, ArrayAccess, Arrayable, Jsonable, JsonSerializable, CompressInterface
 {
     use Concerns\HasAttributes;
     use Concerns\HasEvents;