WooCommerce Product Bundles 8.1.2

* Fix - Deactivate plugin for WooCommerce versions prior to 8.2 to avoid fatal errors.

* Important - New: PHP 7.4+ is now required.
* Important - New: WooCommerce 8.2+ is now required.
* Important - New: WordPress 6.2+ is now required.
* Important - Remove all previously deprecated code.
* Fix - Included own copy of WP_Background_Process library to avoid conflicts with other plugins.
* Fix - Fixed a pay-for-order conflict with WooPayments.

* Fix - Resolved a fatal error triggered with WooCommerce 9.1, when tracking and legacy Order data storage were enabled.
* Tweak - Improved adding bundles to the cart programmatically: support overriding bundled item properties.