WooCommerce Dynamic Pricing 3.2.7

* Fix: Fix category counter for WC < 3.0
* Fix: Check for a valid cart item in the counter before counting categories.
* Fix: Fix Advanced Category Rules where decimal separator is a comma.
* Update: Update tested to WC 3.3.0, WP 4.9.2, copy @ 2018

* Fix: Check product exists before attempting to load pricing rules.
* Update: Added filter, wc_dynamic_pricing_flag_is_on_sale, to indicate if the extension should flag adjusted products as on sale.
default is true.
* Update: Added filter, wc_dynamic_pricing_check_coupons, to determine if Dynamic Pricing should check coupons excluding sale items for discounts.
default is true.
* Update: Add full ability to use custom taxonomies as discount types.
* Fix: Fix custom taxonomy counting for all custom taxonomies, including Product Brands.
* Fix: Added compatibility with WC 3.2.4, 3.2.5

* Fix: Fix mini-cart refresh since WC 3.2