* 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.