Upgrade testing deps #1109

Job	Run time
Run tests with different pydantic versions	3m 43s
Run tests (3.8)	2m 4s
Run tests (3.9)	2m 11s
Run linters (flake8)	1m 50s
Run tests (3.10)	2m 5s
Run linters (pydocstyle)	1m 40s
Run tests with coverage	2m 55s
Run linters (mypy)	1m 46s
Run tests (3.11)	2m 0s
Run tests (3.12)	2m 2s
Run tests on legacy versions (3.7)	2m 6s
Run linters (pylint)	1m 47s
Run tests (3.13)	2m 15s
	28m 24s

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