Возвраты и запросы на гарантию в WooCommerce 2.7.4

* Fix - Prevent fatal error on PHP 8.x when a warranty item has no duration value set.
* Tweak - WooCommerce 10.6 Compatibility.

* Tweak - WooCommerce 10.5 compatibility.

* Fix - Security update.

* Tweak - WordPress 6.9 and WooCommerce 10.4 Compatibility.

* Tweak - WooCommerce 10.3 compatibility.

* Tweak - WooCommerce 10.3 compatibility.

* Tweak - WooCommerce 10.2 compatibility.

* Tweak - WooCommerce 10.1 compatibility.

* Tweak - WooCommerce 9.9 compatibility.

* Update Requires headers for WooCommerce compatibility.
* Update to ubuntu-latest to fix QIT tests.