Test

Bump `coverage` used in GitHub Actions to `v7.0` #23

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Run time

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Job	Run time
Test (Linux) (3.7, v3.7, CPython)	35s
Test (Windows) (3.6, v3.6, CPython)	1m 22s
Test (Linux) (3.8, v3.8, CPython)	23s
Test (Windows) (3.7, v3.7, CPython)	1m 5s
Test (OSX) (3.7, v3.7, CPython)	41s
Test (Linux) (3.9, v3.9, CPython)	37s
Test (OSX) (3.8, v3.8, CPython)	41s
Test (Windows) (3.8, v3.8, CPython)	54s
Test (Linux) (3.10, v3.10, CPython)	41s
Test (Windows) (3.9, v3.9, CPython)	1m 6s
Test (OSX) (3.9, v3.9, CPython)	41s
Test (Windows) (3.10, v3.10, CPython)	57s
Test (Linux) (3.11, v3.11, CPython)	24s
Test (OSX) (3.10, v3.10, CPython)	42s
Test (Linux) (3.12, v3.12, CPython)	36s
Test (Windows) (3.11, v3.11, CPython)	1m 5s
Test (OSX) (3.11, v3.11, CPython)	37s
Test (Linux) (pypy-3.6, v3.6, PyPy)	26s
Test (Windows) (3.12, v3.12, CPython)	1m 5s
Test (OSX) (3.12, v3.12, CPython)	34s
Test (Linux) (pypy-3.7, v3.7, PyPy)	45s
Test (OSX) (pypy-3.7, v3.7, PyPy)	45s
Test (Windows) (pypy-3.7, v3.7, PyPy)	1m 6s
Test (Linux) (pypy-3.8, v3.8, PyPy)	39s
Test (OSX) (pypy-3.8, v3.8, PyPy)	54s
Test (Windows) (pypy-3.8, v3.8, PyPy)	1m 26s
Test (Linux) (pypy-3.9, v3.9, PyPy)	35s
Test (OSX) (pypy-3.9, v3.9, PyPy)	1m 10s
Test (Windows) (pypy-3.9, v3.9, PyPy)	1m 23s
Test (Linux) (pypy-3.10, v3.10, PyPy)	46s
Test (OSX) (pypy-3.10, v3.10, PyPy)	43s
Test (Windows) (pypy-3.10, v3.10, PyPy)	1m 10s
	26m 34s