WooCommerce Dynamic Pricing 3.4.0

* 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.

* Fix: Fix deprecation notice for is_ajax.
* Update: Check pricing rules are an array before attempting to use.

* Correcting version number issue.