fix(ItemParser): optional meta member

https://jsonapi.org/format/#document-resource-identifier-objects

Author: BurningDog

src/Item.php

@@ -114,6 +114,14 @@ public function hasAttributes(): bool
         return !empty($this->toArray());
     }
 
+    /**
+     * @return Meta
+     */
+    public function getDataMeta(): Meta
+    {
+        return $this->meta;
+    }
+
     /**
      * @return array
      */

src/Parsers/ItemParser.php

@@ -191,6 +191,11 @@ function ($identifier) {
             throw new ValidationException(sprintf('ResourceIdentifier property "id" MUST be a string, "%s" given.', gettype($data->id)));
         }
 
-        return $this->getItemInstance($data->type)->setId($data->id);
+        $item = $this->getItemInstance($data->type)->setId($data->id);
+        if (property_exists($data, 'meta')) {
+            $item->setMeta($this->metaParser->parse($data->meta));
+        }
+
+        return $item;
     }
 }