v4.3.0

See https://github.com/fullcalendar/fullcalendar/releases/tag/v4.3.0

v4.2.0

• bugfix: if header/footer were specified as object literals,
  any change to ANY of the FullCalendar component's props would trigger
  a full rerender.
• new dependency: fast-deep-equal
  automatically bundled with UMD dist