Configure pipeline to run tests against different pydantic versions #1

Job	Run time
Run tests with different pydantic versions	3m 33s
Run tests with coverage	3m 3s
Run tests (3.8)	2m 8s
Run linters (flake8)	1m 54s
Run tests (3.9)	1m 59s
Run linters (pydocstyle)	1m 51s
Run tests (3.10)	2m 3s
Run tests on legacy versions (3.7)	2m 12s
Run linters (mypy)	1m 49s
Run tests (3.11)	1m 55s
Run linters (pylint)	1m 56s
Run tests (3.12)	1m 57s
Run tests (3.13)	2m 10s
	28m 30s

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