Add ReturnTypeWillChange to suppress PHP 8.1 deprecation

Reported by Symfony PHPUnit Bridge.

Author: ruudk

src/Definition/Argument.php

@@ -4,6 +4,7 @@
 
 namespace Overblog\GraphQLBundle\Definition;
 
+use ReturnTypeWillChange;
 use function array_key_exists;
 use function count;
 
@@ -42,7 +43,7 @@ public function offsetExists($offset): bool
      *
      * @return mixed|null
      */
-    #[\ReturnTypeWillChange]
+    #[ReturnTypeWillChange]
     public function offsetGet($offset)
     {
         // TODO 1.0: Drop PHP 7.4 support and add mixed return type.

src/Definition/Type/CustomScalarType.php

@@ -7,6 +7,7 @@
 use GraphQL\Type\Definition\CustomScalarType as BaseCustomScalarType;
 use GraphQL\Type\Definition\ScalarType;
 use GraphQL\Utils\Utils;
+use ReturnTypeWillChange;
 use function call_user_func;
 use function is_callable;
 use function sprintf;
@@ -25,6 +26,7 @@ public function __construct(array $config = [])
     /**
      * {@inheritdoc}
      */
+    #[ReturnTypeWillChange]
     public function serialize($value)
     {
         return $this->call('serialize', $value);
@@ -33,6 +35,7 @@ public function serialize($value)
     /**
      * {@inheritdoc}
      */
+    #[ReturnTypeWillChange]
     public function parseValue($value)
     {
         return $this->call('parseValue', $value);
@@ -41,6 +44,7 @@ public function parseValue($value)
     /**
      * {@inheritdoc}
      */
+    #[ReturnTypeWillChange]
     public function parseLiteral(/* GraphQL\Language\AST\ValueNode */ $valueNode, array $variables = null)
     {
         return $this->call('parseLiteral', $valueNode);

src/Upload/Type/GraphQLUploadType.php

@@ -6,6 +6,7 @@
 
 use GraphQL\Error\InvariantViolation;
 use GraphQL\Type\Definition\ScalarType;
+use ReturnTypeWillChange;
 use Symfony\Component\HttpFoundation\File\File;
 use function get_class;
 use function gettype;
@@ -31,6 +32,7 @@ public function __construct(string $name = null)
     /**
      * {@inheritdoc}
      */
+    #[ReturnTypeWillChange]
     public function parseValue($value)
     {
         if (null !== $value && !$value instanceof File) {

src/Validator/Mapping/PropertyMetadata.php

@@ -6,6 +6,7 @@
 
 use ReflectionException;
 use ReflectionProperty;
+use ReturnTypeWillChange;
 use Symfony\Component\Validator\Mapping\MemberMetadata;
 
 class PropertyMetadata extends MemberMetadata
@@ -28,6 +29,7 @@ protected function newReflectionMember($object): ReflectionProperty
         return $member;
     }
 
+    #[ReturnTypeWillChange]
     public function getPropertyValue($object)
     {
         return $this->getReflectionMember($object)->getValue($object);

tests/Functional/App/Type/YearScalarType.php

@@ -7,6 +7,7 @@
 use GraphQL\Error\Error;
 use GraphQL\Language\AST\StringValueNode;
 use GraphQL\Type\Definition\ScalarType;
+use ReturnTypeWillChange;
 use function sprintf;
 use function str_replace;
 
@@ -15,6 +16,7 @@ class YearScalarType extends ScalarType
     /**
      * {@inheritdoc}
      */
+    #[ReturnTypeWillChange]
     public function serialize($value)
     {
         return sprintf('%s AC', $value);
@@ -23,6 +25,7 @@ public function serialize($value)
     /**
      * {@inheritdoc}
      */
+    #[ReturnTypeWillChange]
     public function parseValue($value)
     {
         return (int) str_replace(' AC', '', $value);
@@ -31,6 +34,7 @@ public function parseValue($value)
     /**
      * {@inheritdoc}
      */
+    #[ReturnTypeWillChange]
     public function parseLiteral($valueNode, array $variables = null)
     {
         if (!$valueNode instanceof StringValueNode) {