YITH WooCommerce Ajax Product Filter Premium 5.5.0

* New: Support for WooCommerce 4.3
* Update: plugin framework
* Fix: Security issues on form submit in admin area
* Fix: SortBy Widget doesn't work in search page

* New: Show product count in dropdown filter
* New: Support for WooCommerce 4.2
* Update: plugin framework
* Fix: Reset filter show category page instead of shop
* Dev: yit_get_filter_args hook for filter the filter url arg

* New: Support for WooCommerce 4.1
* Update: plugin framework
* Dev: yith_wcan_color_get_objects_in_term to filter the get_product_in_terms function