Published to pub.dev: https://pub.dev/packages/bifrosted/versions/0.10.0

- OnboardingController, a reusable multi-step flow controller with funnel analytics
- Fixed: SharedPrefService.init() installed a mock store, so nothing persisted
  across app launches
- Breaking: removed SharedPrefService.updateInitialMock; use useMockStorage()
- Added useMockStorage() to package:bifrosted/testing.dart