Make compatible with Symfony 7 to support Drupal core 11.x

[tedbow]

Now that Drupal core 11.x requires Symfony 7 https://www.drupal.org/project/drupal/issues/3432860
this package would also but for the contrib module to work with Drupal 10 it would also have to support Symfony 6. Not sure how hard that would be.

[TravisCarden]

Not sure how hard that would be.

^Not too hard, evidently. 😄 Fixed. Thanks for the report.

[tedbow]

Thanks @TravisCarden !