CI/CD

Update US holidays: add CO Cesar Chavez Day (#1629) #3436

Job	Run time
Run pre-commit	33s
Test Python 3.8 on macOS-latest	1m 3s
Test Python 3.9 on macOS-latest	1m 46s
Test Python 3.10 on macOS-latest	1m 2s
Test Python 3.11 on macOS-latest	1m 53s
Test Python 3.12 on macOS-latest	1m 46s
Test Python pypy-3.9 on macOS-latest	2m 5s
Test Python pypy-3.10 on macOS-latest	2m 22s
Test Python 3.8 on ubuntu-latest	41s
Test Python 3.9 on ubuntu-latest	46s
Test Python 3.10 on ubuntu-latest	47s
Test Python 3.11 on ubuntu-latest	47s
Test Python 3.12 on ubuntu-latest	51s
Test Python pypy-3.9 on ubuntu-latest	2m 15s
Test Python pypy-3.10 on ubuntu-latest	2m 19s
Test Python 3.8 on windows-latest	1m 21s
Test Python 3.9 on windows-latest	1m 23s
Test Python 3.10 on windows-latest	1m 23s
Test Python 3.11 on windows-latest	1m 47s
Test Python 3.12 on windows-latest	1m 19s
Test Python pypy-3.9 on windows-latest	4m 47s
Test Python pypy-3.10 on windows-latest	5m 1s
Finish coveralls	4s
Build distribution	24s
Publish to PyPI	0s
	38m 25s

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