SliverStickyHeaderState class. This state has scrollPercentage and isPinned properties and it's passed to the SliverStickyHeaderBuilder when it changes.
- The second parameter for
SliverStickyHeaderWidgetBuilder takes now a SliverStickyHeaderState instead of a double.
sliverStickyHeaderScrollNotifier argument in SliverStickyHeader constructor.
- Rewrite how to notify the scroll percentage, so that the it does not lag by one frame.
- Initial Open Source release.