1.2.0-alpha01

Dependency Updates:

Dependency	Previous version	New version
appcompat	1.1.0-rc01	1.1.0
core	1.1.0-rc03	1.1.0
transition	1.0.1	1.2.0
vectordrawable	1.1.0-rc01	1.1.0
viewpager2	1.0.0-beta03	1.0.0-beta05

Library Updates:

• New Slider component!
  • Spec
  • Docs
• Theming:
  • Move Material-only default component styles from full themes to bridge themes (b1a6256)
  • Expose utility class for supporting materialThemeOverlay in a style (115313c)
• TextInputLayout:
  • Add support for prefix and suffix text (6e5ddcf) with demo (d1444e2)
• MaterialButtonToggleGroup:
  • Support VERTICAL orientation (24ab59a)
• Snackbar:
  • Add support for message text styling via snackbarTextViewStyle attr (b997092)
  • Add support for app:backgroundTint and app:backgroundTintMode (95af724)
  • Respect left/right system window insets (0c8c6f6)
• TabLayout:
  • Deprecated method setOnTabSelectedListener(OnTabSelectedListener) has been removed. Use addOnTabSelectedListener(OnTabSelectedListener) instead.

Full set of changes: 1.1.0-alpha10...1.2.0-alpha01