Since json_array has been deprecated in Doctrine DBAL we should use json. In graphql this changes how the type opperates. Change the json type in Entity/Dummy and fix the corresponding behat tests.

https://github.com/api-platform/core/blob/main/tests/Fixtures/TestBundle/Entity/Dummy.php#L136-L138

Note that you should probably also change the array type or add the nullable PHP type .

• allow the doctrine/dbal at version 3.x (currently fixed at 2.6 https://github.com/api-platform/core/pull/4544/files#diff-d2ab9925cad7eac58e0ff4cc0d251a937ecf49e4b6bf57f8b95aab76648a9d34R36)