WooCommerce Composite Products 10.4.0

* New - When 'Use defaults' is selected in Catalog Price, also use default option of optional components to calculate price.
* Tweak - Updated version of @somewherewarm/selectsw dependency to include updated styling.

* 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 - Removed all previously deprecated code.
* Fix - Fixed a pay-for-order conflict with WooPayments.
* Fix - Included own copy of WP_Background_Process library to avoid conflicts with other plugins.