Enable coverage analysis using Codecov (#36) #14

Job	Run time
pytest / setup	2s
pytest / setup	3s
pytest / pytest (macos-latest, 3.8)	1m 3s
pytest / pytest (macos-latest, 3.8)	59s
pytest / pytest (macos-latest, 3.9)	40s
pytest / pytest (macos-latest, 3.9)	36s
pytest / pytest (macos-latest, 3.10)	40s
pytest / pytest (macos-latest, 3.10)	36s
pytest / pytest (macos-latest, 3.11)	33s
pytest / pytest (macos-latest, 3.11)	32s
pytest / pytest (macos-latest, 3.12)	36s
pytest / pytest (macos-latest, 3.12)	37s
pytest / pytest (ubuntu-latest, 3.8)	39s
pytest / pytest (ubuntu-latest, 3.8)	33s
pytest / pytest (ubuntu-latest, 3.9)	42s
pytest / pytest (ubuntu-latest, 3.9)	50s
pytest / pytest (ubuntu-latest, 3.10)	37s
pytest / pytest (ubuntu-latest, 3.10)	35s
pytest / pytest (ubuntu-latest, 3.11)	39s
pytest / pytest (ubuntu-latest, 3.11)	34s
pytest / pytest (ubuntu-latest, 3.12)	39s
pytest / pytest (ubuntu-latest, 3.12)	37s
pytest / pytest (windows-latest, 3.8)	1m 47s
pytest / pytest (windows-latest, 3.8)	1m 32s
pytest / pytest (windows-latest, 3.9)	1m 36s
pytest / pytest (windows-latest, 3.9)	1m 38s
pytest / pytest (windows-latest, 3.10)	1m 36s
pytest / pytest (windows-latest, 3.10)	1m 30s
pytest / pytest (windows-latest, 3.11)	1m 40s
pytest / pytest (windows-latest, 3.11)	1m 33s
pytest / pytest (windows-latest, 3.12)	1m 42s
pytest / pytest (windows-latest, 3.12)	1m 30s
pytest / pytest (ubuntu-20.04, 3.6)	35s
pytest / pytest (ubuntu-20.04, 3.6)	33s
	30m 34s

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