• feat: introduce on<Event> API to register event handlers
  • by default events are processed concurrently
• feat: introduce Bloc.transformer API to configure the default EventTransformer
• feat: introduce Emitter<State> to trigger state changes
  • call to trigger a state change (alignment with Cubit)
  • forEach as an analogue for await for
  • onEach to simplify subscription management
  • isDone to abort expensive async operations
• feat: throw StateError if mapEventToState is used in conjunction with on<Event>
• feat: throw StateError if duplicate event handlers are registered
• feat: throw AssertionError when emit is called in a completed EventHandler
• feat: throw AssertionError when emit.onEach and emit.forEach are unawaited
• DEPRECATE: fix: mapEventToState deprecated in favor of on<Event>
• DEPRECATE: fix: transformEvents deprecated in favor of EventTransformer
  • use a built in EventTransformer or define your own
• DEPRECATE: fix: transformTransitions deprecated
  • override Stream<State> get stream to modify the outbound stream