BREAK!: drop Python 3.7 support #710

Job	Run time
style / Determine skipped pre-commit hooks	7s
pytest / Determine job matrix	7s
doc / nb / Execute and build documentation	5m 1s
doc / linkcheck / Check external links	2m 9s
style / Run taplo through pre-commit	28s
style / Run local pre-commit hooks	1m 45s
pytest / Run unit tests (3.10, ubuntu-22.04)	2m 26s
pytest / Run unit tests (3.11, ubuntu-22.04)	2m 17s
pytest / Run unit tests (3.9, ubuntu-22.04)	4m 24s
pytest / Run unit tests (3.8, ubuntu-22.04, tensorwaves)	3m 19s
pytest / Run unit tests (3.9, macos-12)	3m 13s
style / Push changes	6s
doc / Upload to GitHub Pages	0s
	25m 22s

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