* Add - REST endpoint to get all bookable products.
* Add - REST endpoint to get all categories that have bookable products.
* Add - REST endpoint to get all resources.
* Add - REST endpoint to get booking slots (available and booked).
* Add - REST endpoint to get bookings (available and booked).
* Fix - Customer defined blocks with different duration will not work.
* Fix - Changing Resource resets person count to blank.
* Fix - Prevent duplicate order status update notice.
* Fix - Issue with Google Calendar Connection when tokens had expired.
* Fix - Fatal error when opening admin calendar when Google recurring event is added.
* Fix - IE11 support for calendar.
* Fix - Admin calendar events popup details position was misaligned.
* Fix - PHP warning when trying to display guest name in the bookings order details in certain situations.
* Fix - Unlink products with resources when they are deleted to prevent resource display issue.
* Fix - Add back filter `woocommerce_bookings_gcalendar_sync` to update google event during sync.
* Tweak - Bookings by slot ajax query can be paginated.
* Tweak - Update copy on duration validation message.
* Tweak - Optimized data caching for performance.
* Tweak - WC 3.6 compatibility.
