[TOOLS] Fix all errors found by PHPStan level 1

plugins/ActivityStreamsTwo/Util/Response/TypeResponse.php

@@ -12,7 +12,7 @@ class TypeResponse extends JsonResponse
      *
      * @return JsonResponse
      */
-    public function __construct($data = null, int $status = 202, array $headers = [], bool $json = false)
+    public function __construct($data = null, int $status = 202)
     {
         parent::__construct(
             data: !is_null($data) ? $data->toJson() : null,

plugins/ActivityStreamsTwo/Util/Type/AbstractObject.php

@@ -31,6 +31,8 @@ abstract class AbstractObject
      */
     private array $_props = [];
 
+    protected string $type = 'AbstractObject';
+
     /**
      * Standard setter method
      * - Perform content validation if a validator exists