• BREAKING: remove initialState override in favor of providing the initial state via super (#1304).
• BREAKING: Remove BlocSupervisor and rename BlocDelegate to BlocObserver.
• feat: support null states (#1312).
• refactor: bloc to extend cubit rather than Stream.
• feat: ignore newly added events after bloc is closed (#1236).
• feat: add addError to conform to EventSink interface.
• feat: mark onError, onTransition, onEvent as protected.
• docs: documentation improvements
• docs: logo updates