WooCommerce Bookings 2.2.0

* Add - Declare compatibility with High-Performance Order Storage ("HPOS").
* Fix - Admin access for bulk action requests.

* Fix - Prevent bookings and display end-times in unavailable times on another day.
* Fix - Resource cost not included in booking cost when `=` used in booking cost ranges.
* Tweak - Bump minimum WooCommerce version from 2.6 to 6.0.
* Tweak - Prevent unneeded ajax calls to wc_bookings_calculate_costs to improve performance.
* Tweak - Set minimum PHP version to 7.0.
* Tweak - Set minimum WordPress version to 5.6

* Add - Provision to apply 'Booking Person Discount' from admin dashboard.
* Fix - "Min persons" setting is not working when Booking is added manually from admin.
* Fix - Booking availability for bookable products with resources.
* Fix - Changing booking status or date/time moves the booking to the last line item in the order.
* Fix - Improvements to admin side calendar view.
* Fix - Slot range checked to be inside the rule range for an hour and minute durations.
* Tweak - Skip array value booking metadata during sync booking with GCal.
* Update - Change keypress event to keyup.
* Update - Lock the `google/apiclient-services` to v0.181.0