v4.2.0

• Support for horizontal StackedBarChart

  StackedBarChart now supports the prop horizontal
  just as a regular BarChart. Thanks to @colin-young for this ❤️

• StackedBar/AreaChart adheres to new extras api

  StackedBarChart and StackedAreaChart was still on the legacy renderExtras
  pattern. It has now been migrated to the single extras prop api.