Add support for channel notices #356

Job	Run time
Lint (Python 3.10 on ubuntu-latest)	1m 8s
Test (Python 3.8 on macos-latest)	2m 2s
Test (Python 3.9 on macos-latest)	1m 42s
Test (Python 3.10 on macos-latest)	1m 18s
Test (Python 3.11 on macos-latest)	1m 51s
Test (Python 3.12 on macos-latest)	1m 32s
Test (Python 3.8 on ubuntu-latest)	49s
Test (Python 3.9 on ubuntu-latest)	44s
Test (Python 3.10 on ubuntu-latest)	54s
Test (Python 3.11 on ubuntu-latest)	45s
Test (Python 3.12 on ubuntu-latest)	55s
Test (Python 3.8 on windows-latest)	2m 50s
Test (Python 3.9 on windows-latest)	2m 58s
Test (Python 3.10 on windows-latest)	2m 51s
Test (Python 3.11 on windows-latest)	3m 6s
Test (Python 3.12 on windows-latest)	2m 52s
	28m 17s

Provide feedback