YITH WooCommerce Wishlist Premium 3.31.0

* New: support for WooCommerce 4.9
* Update: plugin framework
* Tweak: corrected wrong text domain for a string
* Tweak: improved product name sanitization on wishlist template
* Tweak: added variation details to Ask an Estimate email
* Tweak: improved code style for all email templates
* Fix: wishlist search not working for guest users
* Dev: added fifth parameter for yith_wcwl_add_to_wishlist_button_html filter
* Dev: added new yith_wcwl_promotion_email_item filter

* New: support for WordPress 5.6
* New: support for WooCommerce 4.7
* New: possibility to update plugin via WP-CLI
* Update: plugin framework
* Update: french translation
* Tweak: search view now shows matching wishlists instead of all the lists of matching customers
* Tweak: default wishlist sorting now places last added item as heading item
* Fix: avoid using localized string as param name for bulk action on wishlists table
* Fix: prevent possible fatal errors due to missing email classes
* Dev: added yith_wcwl_reload_on_found_variation filter to allow dev programmatically disable ATW reload on found_variation
* Dev: added yith_wcwl_wishlist_view_images_after_thumbnail action
* Dev: added yith_wcwl_modern_wishlist_empty_message filter
* Dev: added yith_wcwl_ask_estimate_email_wishlist_name filter
* Dev: removed deprecated .ready method from scripts

* New: support for WooCommerce 4.6
* Update: plugin framework
* Tweak: return product price as float in item class
* Fix: bulk add to cart checkbox in the wishlist table not working
* Fix: prevent possible fatal error when printing ATW button
* Fix: original price being sent to database as int instead of float
* Fix: wrong layout being loaded for manage endpoint
* Dev: added new filter yith_wcwl_get_product_image_with_path
* Dev: added new filter yith_wcwl_set_session_cookie
* Dev: added new filter yith_wcwl_privacy_value
* Dev: added new filter yith_wcwl_wishlist_privacy_types
* Dev: added new filter yith_wcwl_available_admin_tabs_premium
* Dev: added new parameter to yith_wcwl_{privacy}_wishlist_visibility filter