deprecation warning

User Deprecated: Method "Doctrine\DBAL\Types\Type::getName()" might add "string" as a native return type declaration in the future. Do the same in child class "AlexandreFernandez\JsonTranslationBundle\Doctrine\Type\JsonTranslationType" now to avoid errors or add an explicit @return annotation to suppress this message. ["except

Fix is obviously to add :string

public function getName(): string