* Dev – Bump PHP minimum supported version to 7.3.

* Add – Guest customer will get a claim warranty link after the order is completed.
* Fix – Display a notice text for non logged-in user when submitting the return form shortcode.
* Update – Security update.

* Tweak – Uniquely register the scheduled actions.
* Tweak – Updated plugin author.
* Tweak – Tested compatibility up to WC 8.2.
* Tweak – Tested compatibility up to WP 6.3.
* Fix – Address PHP 8.1+ deprecation notices.
* Dev – Use a WC background process to handle the plugin updates.
* Dev – Dropped deprecated code from versions 3.x.
* Dev – Dropped deprecated filter hook `wc_aweber_checkout_content_location`.
* Dev – Dropped classes `WP_Async_Request` and `WP_Background_Process` from core.
* Dev – Dropped `woo-includes/` files.
* Dev – Updated the minimum requirements to WC 3.7, WP 4.9, and PHP 5.6.

* Tweak – WC 8.2 compatibility.

* Update – Security Update.