fix: ensure ArrayObject entities can be extracted in all PHP versions

Adds checks for `ArrayObject` entities in each implementation of the EntityExtractorHydrator, calling `getArrayCopy()` on the instance when found, instead of `get_object_properties()`

Signed-off-by: Matthew Weier O'Phinney <matthew@weierophinney.net>

src/Extractor/EntityExtractorHydratorV2.php

@@ -8,6 +8,7 @@
 
 namespace Laminas\ApiTools\Hal\Extractor;
 
+use ArrayObject;
 use JsonSerializable;
 use Laminas\ApiTools\Hal\EntityHydratorManager;
 use Laminas\Hydrator\ExtractionInterface;
@@ -68,6 +69,10 @@ private function extractEntity($entity)
             return $entity->jsonSerialize();
         }
 
+        if ($entity instanceof ArrayObject) {
+            return $entity->getArrayCopy();
+        }
+
         return get_object_vars($entity);
     }
 }

src/Extractor/EntityExtractorHydratorV3.php

@@ -8,6 +8,7 @@
 
 namespace Laminas\ApiTools\Hal\Extractor;
 
+use ArrayObject;
 use JsonSerializable;
 use Laminas\ApiTools\Hal\EntityHydratorManager;
 use Laminas\Hydrator\ExtractionInterface;
@@ -68,6 +69,10 @@ private function extractEntity(object $entity) : array
             return $entity->jsonSerialize();
         }
 
+        if ($entity instanceof ArrayObject) {
+            return $entity->getArrayCopy();
+        }
+
         return get_object_vars($entity);
     }
 }