Redux 4 Support, onWillChange Updates

• Breaking Change: onWillChange now receives previous and new ViewModel
• Breaking Change: Supports Redux 4.x - 5.0

Converter always run on widget rebuild, Improved Docs

• Bugfix: Rebuilding the Widget will always rebuild with latest data
• Enforce pedantic lint rules
• Docs
  • Document all public members
  • Add more examples to README