Tests

Increase test coverage requirement to 84% #1776

Job	Run time
check	27s
Run test suite (ubuntu-20.04, 3.8)	3m 47s
Run test suite (ubuntu-20.04, 3.9)	4m 12s
Test docker image	3m 27s
Run test suite (ubuntu-20.04, 3.10)	4m 12s
Inspect test runner output in the context of a Github Workflow	26s
Run test suite (ubuntu-22.04, 3.8)	4m 21s
Run test suite (ubuntu-22.04, 3.9)	4m 14s
Test we can build PyPI package	43s
Run test suite (ubuntu-22.04, 3.10)	3m 48s
Run test suite (windows-2019, 3.8)	1m 36s
Run test suite (windows-2019, 3.9)	2m 7s
Run test suite (windows-2019, 3.10)	2m 18s
Run test suite (macos-14, 3.8)	1m 22s
Run test suite (macos-14, 3.9)	1m 12s
Run test suite (macos-14, 3.10)	55s
required-checks	4s
	39m 11s

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