refactor(bloc)!: introduce `EmittableStateStreamableSource` #965

Job	Run time
👀 Detect Changes	8s
✅ Semantic Pull Request / build	4s
🎯 angular_bloc	40s
🛡️ angular_counter	1m 1s
🧑‍🎓 flutter_bloc_with_stream	1m 9s
🎯 bloc_concurrency	35s
📖 docs	1m 48s
🛡️ github_search/angular_github_search	1m 5s
🧑‍🎓 flutter_complex_list	1m 12s
🎯 bloc_test	37s
🧑‍🎓 flutter_counter	1m 8s
🎯 bloc_tools	40s
🧑‍🎓 flutter_dynamic_form	1m 13s
🎯 bloc	39s
🐦 flutter_bloc	1m 19s
🧑‍🎓 flutter_firebase_login	1m 28s
🐦 replay_bloc	55s
🧑‍🎓 flutter_form_validation	53s
🐦 hydrated_bloc	59s
🧑‍🎓 flutter_infinite_list	1m 8s
🧑‍🎓 flutter_login	1m 10s
🧑‍🎓 flutter_shopping_cart	1m 14s
🧑‍🎓 flutter_timer	1m 7s
🧑‍🎓 flutter_todos	1m 28s
🧑‍🎓 flutter_weather	1m 26s
🧑‍🎓 flutter_wizard	54s
🧑‍🎓 github_search/flutter_github_search	54s
deploy	0s
build	2s
	26m 56s

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