- Renamed the `backup` and `restore` commands to `db/backup` and `db/restore`. ([#7023](https://github.com/craftcms/cms/issues/7023))
- Relational fields now include all related elements’ titles as search keywords, including disabled elements. ([#7079](https://github.com/craftcms/cms/issues/7079))
- `craft\services\Composer::install()` no longer has an `$allowlist` argument.
- Craft no longer reports PHP deprecation errors.
- Updated Guzzle to 7.x, for environments running PHP 7.2.5 or later, and where the `config.platform.php` value in `composer.json` is at least `7.2.5`. ([#6997](https://github.com/craftcms/cms/issues/6997))