Log Message:
py-m3u8: updated to 4.0.0

4.0.0

Remove class for UTC compat for Python 2
Use built-in ISO 8601 parse for Python 3.11 and later
Run pyupgrade for 3.7
Upgrade actions to latest stable version
Add 3.12 to the list of versions to test
Pass timespec all the way down in dumps
Ruff cleanup
Run format with ruff