(v5.13.0) YITH WooCommerce Booking and Appointment Premium Free Download

New: support for WooCommerce 8.9
Update: YITH plugin framework
Update: language files
Fix: show edit order link only if the order exists
Fix: unminified file admin booking availability rules
Fix: 'uid' field imported from external calendars
Fix: issue with dates imported from external calendars when the timezone offset of the future date is different from the current one, due to daylight saving time
Fix: do type cast after checking if product data tab class exists
Tweak: Prevent fatal error if the cart does not pass validation and resources are enabled