Expose grid and constellation settings #65

Job	Run time
publish / Build source and wheel distribution	5m 25s
tests / Load tox environments	5s
tests / codestyle (ubuntu-latest)	58s
tests / py37-test (ubuntu-latest)	3m 39s
tests / py38-test (ubuntu-latest)	3m 20s
tests / py39-test (ubuntu-latest)	3m 57s
tests / py310-test (ubuntu-latest)	3m 14s
tests / py37-test (macos-latest)	8m 37s
tests / py38-test (macos-latest)	6m 10s
tests / py39-test (macos-latest)	4m 46s
tests / py310-test (macos-latest)	4m 10s
tests / py37-test (windows-latest)	3m 46s
tests / py38-test (windows-latest)	7m 51s
tests / py39-test (windows-latest)	5m 3s
tests / py310-test (windows-latest)	7m 4s
	1h 8m 5s

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