YITH Woocommerce Dynamic Pricing and Discounts Premium 4.15.0

* Update: Plugin Framework
* Fix: Fixed issues with YITH WooCommerce Membership

* Fix: Fixed issue with percentage amount
* Fix: Fixed Exclusion rule issues

* New: Support for WooCommerce 4.2
* New: Elementor Support
* Update: Plugin Framework
* Fix: Fixed issue with minimum price for variable products
* Fix: Issue on quantity table