* ADD: Workflows functionality;
* ADD: Zoom integration;
* ADD: Timezones picker for the front-end appointments calendar UI;
* ADD: Public actions functionality (confirm and cancel appoinments by URL);
* ADD: Allow to override day schedule with Working Days settings;
* UPD: Admin UI improvements;
* FIX: SQL errors on MySQL 8.0 or higher;
* FIX: Allow to set 0 into service price.
* ADD: Allow to automatically change appointemnts status by Cron;
* ADD: Allow two-way synchronization for WC Orders and appointments;
* ADD: Allow to limit allowed for appointment days range;
* FIX: Adding appointments from admin area;
* FIX: Elemenotr Popup compatibility
* FIX: Providers ans Services switch when custom template is used.
* FIX: try to create DB tables only if not exists;
* FIX: days off checking;
* FIX: correctly process float values for slots;
* FIX: prevent PHP errors;
* FIX: correctly refresh services and providers list.
ADD: Duration step in time picker settings
* FIX: Display appointments on the calendar
* FIX: Option "Availability check by"
FIX: UTC time