WooCommerce Dynamic Pricing 3.2.6

* Update: Added an argument to the quantity collector filter, which now passes in the rule set.
* Update: Properly sort cart items for discounting in ascending order.
* Update: Use multiselect fields instead of checkboxes in Advanced Category Rules.
* Update: Use multiselect fields instead of checkboxes in Advanced Product Rules.
* Update: Use multiselect fields instead of checkboxes in Order Total Pricing.
* Update: Use variation names instead of variation ID's only in Advanced Product Rules.
* Fix: Fix issue with the woocommerce_dynamic_pricing_count_categories_for_cart_item filter where the wrong cart item was being passed.

* Update: Include 0 based pricing for advanced category rules when using Groups.
* Fix: Fix issue where Mix and Match product children product titles were incorrectly being set to the parent name.
* New: Allow WooCommerce Memberships to be used for advanced pricing rules, "Applies To".
* Fix: Double check a variations parent exists before getting it's categories.

* Fix: Fix issue where prices were not discounted in the shop for Variable Subscription products.
* Update: Add filter to disable cumulative simple rules. add_filter('woocommerce_dynamic_pricing_is_cumulative', '__return_false');
* Update: Skip cached prices when $force_calculation is passed into on_get_price();
* Update: Don't preform tax calculations on fixed price adjustments, WooCommerce already does the calculations for us.