WooCommerce Dynamic Pricing 3.2.8

* Update: WC and WP Compatibility updates.
* Fix: Fix issue with rules that were set as 0 amount. This was causing the rest of the rules to be ignored.

* Fix: More PHP 8 compatibility fixes.
* Fix: Fix issues with echo statements in the admin.
* Compatibility: Add support for WooCommerce HPOS.
* Compatibility: WP and WC updates.

* Update: Remove legacy woo-themes updater.
* Fix: Fix problem when registering additional taxonomies with advanced rules.
* Fix: Proper casting of values before performing operations - PHP 8.x compatibility.
* Fix: Fix problem with PHP 8.x compatibility.
* New: Added filter, current_user_can_manage_dynamic_pricing, to allow users to disable the dynamic pricing management section.