Drop D9 and PHP7 Support before stable

This seems to imply that the 3.x branch once released wont support drupal 9. I think it is very important to let folks know that this is an additional reason to downgrade to 1.x rather than up to 3.x. Obviously many many of us aren't at drupal 10 yet. The main page: https://www.drupal.org/project/inline_entity_form doesn't make any mention of this and in fact encourages updating to 3.x Personally - I can't quite update to D10 yet - still some modules that don't work - so having 3.x support 9.x would be great...