Fix unexpected JSON resource serialization.

Author: TheDoctor0

Diff for: src/Response.php

@@ -130,7 +130,9 @@ public function resolvePropertyInstances(array $props, Request $request, bool $u
             }
 
             if ($value instanceof ResourceResponse || $value instanceof JsonResource) {
-                $value = $value->toResponse($request)->getData(true);
+                $value = tap($value, static function ($value) {
+                    $value->withoutWrapping();
+                })->toResponse($request)->getData(true);
             }
 
             if ($value instanceof Arrayable) {

Diff for: tests/Stubs/FakeResource.php

@@ -13,13 +13,6 @@ class FakeResource extends JsonResource
      */
     private $data;
 
-    /**
-     * The "data" wrapper that should be applied.
-     *
-     * @var string|null
-     */
-    public static $wrap = null;
-
     public function __construct(array $resource)
     {
         parent::__construct(null);