• BREAKING: refactor!: make onData callback in emit.onEach and emit.forEach named
• BREAKING: feat!: rename emit.isCanceled to emit.isDone to encapsulate completion and cancelation
• feat: introduce optional onError in emit.onEach and emit.forEach
• feat: throw AssertionError when emit is called in a completed EventHandler
• feat: throw AssertionError when emit.onEach and emit.forEach are unawaited
• fix: emit.onEach and emit.forEach error propagation when stream emits an error