Implements ObjectAwareSerializationInterface

Closes #3451959

src/Serialization/MessagePack.php

@@ -2,12 +2,13 @@
 
 namespace Drupal\msgpack\Serialization;
 
+use Drupal\Component\Serialization\ObjectAwareSerializationInterface;
 use Drupal\Component\Serialization\SerializationInterface;
 
 /**
  * Provides a MessagePack serialization implementation.
  */
-class MessagePack implements SerializationInterface {
+class MessagePack implements SerializationInterface, ObjectAwareSerializationInterface {
 
   /**
    * {@inheritdoc}