Bump clap from 4.5.13 to 4.5.20 #1917

Job	Run time
Wheel on macos-12 py-3.8	2m 46s
Wheel on ubuntu-latest py-3.8	2m 56s
Checks	44s
Wheel on windows-latest py-3.8	3m 23s
coverage	8m 24s
Run fuzz targets (macos-12, 3.8)	15m 19s
Run fuzz targets (ubuntu-latest, 3.8)	13m 10s
Unit tests (macos-12, 3.8)	5m 7s
Unit tests (ubuntu-latest, 3.8)	3m 28s
Unit tests (windows-latest, 3.8)	6m 47s
Upload to PyPI	32s
	1h 2m 36s

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