Bump serde from 1.0.210 to 1.0.211 #1943

Job	Run time
Wheel on macos-13 py-3.8	3m 34s
Checks	55s
Wheel on ubuntu-latest py-3.8	2m 57s
coverage	8m 4s
Run fuzz targets (macos-13, 3.8)	17m 43s
Wheel on windows-latest py-3.8	2m 27s
Run fuzz targets (ubuntu-latest, 3.8)	12m 52s
Unit tests (macos-13, 3.8)	6m 10s
Unit tests (ubuntu-latest, 3.8)	3m 29s
Unit tests (windows-latest, 3.8)	5m 16s
Upload to PyPI	27s
	1h 3m 54s

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