Merge pull request #457 from kiritokatklian/patch-1

Revert "update to be compatible with nova 5"

src/Fields/Media.php

@@ -287,7 +287,7 @@ private function removeDeletedMedia($data, Collection $medias): Collection
      * @param HasMedia|InteractsWithMedia $resource
      * @param null $attribute
      */
-    public function resolve($resource, ?string $attribute = null): void
+    public function resolve($resource, $attribute = null): void
     {
         $collectionName = $attribute ?? $this->attribute;