Merge pull request #276 from mrtnmtth/3.x

Fix PHP 8.1 deprecations.

src/ResultSet.php

@@ -219,6 +219,7 @@ public function countSuggests()
      *
      * @return \Cake\ElasticSearch\Document
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         $class = $this->entityClass;
@@ -255,6 +256,16 @@ public function serialize()
         return serialize([ $this->resultSet, $this->queryObject ]);
     }
 
+    /**
+     * Magic method for serializing the ResultSet instance
+     *
+     * @return array
+     */
+    public function __serialize(): array
+    {
+        return [$this->resultSet, $this->queryObject];
+    }
+
     /**
      * Unserializes the passed string and rebuilds the ResultSet instance
      *
@@ -266,6 +277,17 @@ public function unserialize($serialized)
         $this->__construct(...unserialize($serialized));
     }
 
+    /**
+     * Magic method for unserializing the ResultSet instance
+     *
+     * @param array $data The serialized data
+     * @return void
+     */
+    public function __unserialize(array $data): void
+    {
+        $this->__construct(...$data);
+    }
+
     /**
      * Debug output hook method.
      *