fix: custom relationship meta not returned on PaginatedRelatedResourceResponse or PaginatedIdentifierResponse

Author: Gregory Haddow

Diff for: src/Core/Responses/Concerns/HasRelationship.php

@@ -48,7 +48,7 @@ private function allMeta(): ?Hash
      *
      * @return array|null
      */
-    private function metaForRelationship(): ?array
+    protected function metaForRelationship(): ?array
     {
         if ($this->hasRelationMeta && $relation = $this->relation()) {
             return $relation->meta();

Diff for: src/Core/Responses/Internal/PaginatedIdentifierResponse.php

@@ -43,6 +43,8 @@ public function __construct(JsonApiResource $resource, string $fieldName, Page $
     public function meta(): Hash
     {
         return Hash::cast($this->page->meta())->merge(
+            Hash::cast(parent::metaForRelationship())
+        )->merge(
             parent::meta()
         );
     }

Diff for: src/Core/Responses/Internal/PaginatedRelatedResourceResponse.php

@@ -43,6 +43,8 @@ public function __construct(JsonApiResource $resource, string $fieldName, Page $
     public function meta(): Hash
     {
         return Hash::cast($this->page->meta())->merge(
+            Hash::cast(parent::metaForRelationship())
+        )->merge(
             parent::meta()
         );
     }