* Add - Check booking availability on checkout validation to reduce over-booking.
* Dev - Added a 'state' parameter to the custom Google Calendar connection.
* Dev - Migrate end-to-end tests to Playwright.
* Dev - Prefix composer `google/apiclient` package with `brianhenryie/strauss`.
* Dev - Resolve PHP deprecated warning `usort(): Returning bool from comparison function`.
* Dev - Update PHP dependency to 7.2.
* Fix - "Confirm Booking" link not working from email and shows "The link you followed has expired.".
* Fix - Ensures that labels on Bookings page in My Account are able to be translated.
* Tweak - WC 7.5.0 compatibility.
