YITH Booking and Appointment for WooCommerce Premium 5.11.0

* New: support for WooCommerce 4.3
* Update: plugin framework
* Update: language files
* Fix: issue with Google Calendar sync when creating bookings through the Create Booking page on backend
* Tweak: prevent issue when booking product form is shown in products shown in the WP Customizer
* Tweak: prevent calendar style issues in combination with some themes
* Tweak: localized missing strings in Logs tab
* Dev: added yith_wcbk_searched_categories filter
* Dev: added yith_wcbk_related_booking_title filter
* Dev: added yith_wcbk_totals filter

* New: support for WooCommerce 4.2
* Update: plugin framework
* Update: language files
* Fix: issue when 'cancelled term' is set to 1 month
* Dev: added yith_wcbk_service_free_text filter

* New: support to YITH WooCommerce Sms Notifications
* Fix: issue with YITH WooCommerce Request a Quote when adding to quote hourly booking products
* Tweak: prevent issues when calculating service costs