Dependency updates

• upgrade to target API 30
• material 1.2.1
• constraintlayout 2.0.0

Fixes / Changes

• adjust default values according to documentation,
  • Thanks @Ceees2
• introduce new flag to allow adjusting the behaviour for notifying on auto toggle expandable
• update gradle to v6.6.1
• update gradle build tools
• update compileSDK
• update build tools
• update various dependencies to their latest stable version