Support 11.2

The only deprecation on 11.2 that is triggered by this module that's left is

1) core/modules/views/src/ViewsConfigUpdater.php:356
The update to add a default table CSS class for view "locked_content" is deprecated in drupal:11.2.0 and is removed from drupal:12.0.0. Profile, module and theme provided configuration should be updated. See https://www.drupal.org/node/3499943

Triggered by:

* Drupal\Tests\content_lock\Functional\ContentLockNodeTest::testEdit
  modules/content_lock/tests/src/Functional/ContentLockNodeTest.php:37

We can't fix this until the minimum supported core version is 11.2.x. The hook and attribute conversions for 11.2 (and lower) deprecations have been done in a BC compatible manner so the module is working on D10 and D11.1 and D11.2

Let's get this in - tests are green and all the hooks apart from content_lock_timeout are converted. I'm not doing that because we're going to merge the functionality in that module into the main module.

Automatically closed - issue fixed for 2 weeks with no activity.