WooCommerce Bookings 2.1.2

* Fix - Error 500 when using external object cache, such as Memcached.
* Fix - Days with availability > 1 calendar shows fully booked after 1 booking.
* Fix - Emails are triggered when saving a booking and changes aren't made.

* Fix - Update WC 3.x compatibilities when duplicating product.
* Fix - Taxes not added when creating a booking from admin.
* Fix - Admin calendar time slots has the wrong sizes and start times.
* Fix - Resources display wrong sum of cost in frontend dropdown.
* Fix - Resources able to be added to product twice.
* Fix - Reminder and complete cron events not set if Booking is created without an order from the backend.
* Fix - Fatal error when bookings used with a cached objects.
* Fix - Email ID was the same for customer and admin booking cancelled email.
* Fix - All day booking option was being ignored on calendar after availability refactor.
* Fix - Missing utf8_encode function when no XML PHP module installed in google calendar integration.
* Fix - Availability rules using Date Range calculation on the frontend.
* Fix - "Connect with Google" does not save/update entries.
* Fix - Availability rules with dates in the past should be ignored for performance reasons.
* Tweak - Add woocommerce_bookings_email_actions filter to allow additional Bookings emails.
* Fix - Audit usages of get_price / price filters for Memberships/Dynamic Discounts compatibility.
* Fix - Default price being used when price rules make price 0.
* Tweak - Do not display 'View my bookings' link if guest checkout used.
* Fix - Incorrect date being checked when getting time slots vs availability rules.
* Fix - Endless loop when auto completion of booking when it has no order.
* Tweak - Re-introduce adjacent buffering option for Days.

* Fix - Memberships discounts not working.
* Fix - Duplicating product creates multiple copies of meta fields.
* Fix - Fatal errors when applying bookable person coupons when other product types in cart.
* Fix - Deleting one booking deletes the whole order.
* Fix - Leftover bookings cron hooks after booking was deleted.
* Add - Is valid booking check to 'wc-booking-complete' action.
* Fix - Only sync Google Calendar if the integration is configured.
* Fix - When a resource is attached, booking multiple days shows partials days when they are not.
* Fix - Base cost did not include resource cost unless there were persons.
* Fix - `/bookings/` slug always redirects to Blog page.
* Fix - Undefined offset when viewing order with persons added to the booking.
* Fix - All day booking option was being ignored when parsing bookings for calendar availability.
* Fix - Delete database entries on uninstall only in case `WC_REMOVE_ALL_DATA` is true.
* Fix - Manual POST request can bypass calendar validation.
* Tweak - Update order status if booking status changes to paid or unpaid.
* Tweak - Update maximum resource count indicator on calendar block.
* Fix  - Undefined variable notice for booking_persons when editing booking.
* Fix  - Issue where availability rules were not applied against duration calculation.
* Tweak - Refactor `find_fully_booked_blocks` to be consistent with the time slots display.
* Fix - Not needed 'to' label added for Date Range (Global Availability) when also Date Range with time is added.
* Fix - Virtual orders were being marked as processing after being marked as completed.
* Tweak - Hide adjacent buffering option for Days, as it is not used for Days.