Fix failing resource nested test (#729)

Author: nicodevs

tests/fixtures/tests/pest/api-resource-nested.php

@@ -5,13 +5,16 @@
 use App\Models\Comment;
 use App\Models\Post;
 use App\Models\User;
+use JMac\Testing\Traits\AdditionalAssertions;
 use function Pest\Faker\fake;
 use function Pest\Laravel\assertModelMissing;
 use function Pest\Laravel\delete;
 use function Pest\Laravel\get;
 use function Pest\Laravel\post;
 use function Pest\Laravel\put;
 
+pest()->use(AdditionalAssertions::class);
+
 test('index behaves as expected', function (): void {
     $post = Post::factory()->create();
     $comments = Comment::factory()->count(3)->create();