CI/CD

Update US holidays: add CO Cesar Chavez Day (#1629) #3435

Job	Run time
Run pre-commit	29s
Test Python 3.8 on macOS-latest	1m 14s
Test Python 3.9 on macOS-latest	1m 1s
Test Python 3.10 on macOS-latest	1m 38s
Test Python 3.11 on macOS-latest	1m 52s
Test Python 3.12 on macOS-latest	1m 54s
Test Python pypy-3.9 on macOS-latest	2m 25s
Test Python pypy-3.10 on macOS-latest	2m 12s
Test Python 3.8 on ubuntu-latest	43s
Test Python 3.9 on ubuntu-latest	46s
Test Python 3.10 on ubuntu-latest	44s
Test Python 3.11 on ubuntu-latest	52s
Test Python 3.12 on ubuntu-latest	52s
Test Python pypy-3.9 on ubuntu-latest	2m 16s
Test Python pypy-3.10 on ubuntu-latest	2m 12s
Test Python 3.8 on windows-latest	1m 32s
Test Python 3.9 on windows-latest	1m 24s
Test Python 3.10 on windows-latest	1m 28s
Test Python 3.11 on windows-latest	1m 49s
Test Python 3.12 on windows-latest	1m 31s
Test Python pypy-3.9 on windows-latest	4m 56s
Test Python pypy-3.10 on windows-latest	4m 52s
Build distribution	25s
Finish coveralls	8s
Publish to PyPI	0s
	39m 15s

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