Fullcalendar: v5.0.0-rc Release

Changes since beta.4: - breaking changes: - renamed datesDidUpdate to datesSet and added more props to the arg - for eventResize callback arg, renamed prevEvent to oldEvent - resources are ordered by ID by default. no longer sort by natural order - new features: - system for overriding CSS variables - timegrid event titles are sticky-positioned while scrolling - eventDrop now receives relatedEvents prop - eventResize now receives relatedEvents prop - eventReceive now receives relatedEvents prop and a revert function - eventLeave now receives relatedEvents prop and a revert function - eventAdd - eventChange - eventRemove - eventsSet - initialEvents - Event::toPlainObject, Event::toJSON - Event::startStr, Event::endStr - Calendar::addEvent accept true for source - resourceAdd - resourceChange - resourceRemove - resourcesSet - initialResources - Resource::setProp - Resource::setExtendedProp - Resource::toPlainObject, Resource::toJSON - View::calendar - bugfixes: - Event popover display issues with many events (#5471) - Jest test runner cannot find fullcalendar modules (#5467) - Incorrect version of tslib required (#5479) - License key option unknown, error in console (#5462) - @fullcalendar/common has no exported member ScrollGridChunkConfig (#5459)