YITH WooCommerce Wishlist Premium 4.0.1

* Update: YITH plugin framework
* Update: language files
* Tweak: prevented empty name as wishlist default name

* New: support for WordPress 6.5
* New: support for WooCommerce 8.7
* Update: YITH plugin framework

* New: support for WooCommerce 8.6
* Update: YITH plugin framework
* Dev: added new filter yith_wcwl_skip_wishlist_item_add_to_cart
* Dev: added new filter yith_wcwl_min_item_quantity