Use pyproject.toml for coverage configuration #230

Job	Run time
build-and-test (ubuntu-latest, 3.9)	17m 16s
build-and-test (ubuntu-latest, 3.10)	2m 23s
build-and-test (ubuntu-latest, 3.11)	7m 10s
build-and-test (macos-latest, 3.9)	28m 56s
build-and-test (macos-latest, 3.10)	4m 17s
build-and-test (macos-latest, 3.11)	11m 4s
build-and-test (windows-latest, 3.9)	24m 2s
build-and-test (windows-latest, 3.10)	11m 32s
build-and-test (windows-latest, 3.11)	17m 20s
	2h 4m 0s

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