Bump to latest (#71)

- Window lifecycle (dotnet#1754)
- Move New Navigation Handler to Core and make it internal (dotnet#1800)
- Scrollview handler (dotnet#1669)
- ScrollView Resize + Window Handler Resize (dotnet#1676)
- Font AutoScalingEnabled (dotnet#1774)
- Rename Font Properties (dotnet#1755)
- Update layout system to ensure native measure/arrange are called for all controls, even from Page subclasses (dotnet#1819)
- IContainer as IList<IView> (dotnet#1724)
- Implement Layout padding for new StackLayouts and GridLayout (dotnet#1749)
- Delete all the TabIndex, TabStop, Focusable things! (dotnet#1777)
- Introduce SetSemanticFocus API via SemanticExtensions (dotnet#1829)
- Improve Window and AnimationManager (dotnet#1653)
- And so on