Linux

Compat of `mypy` with 3.7 #1404

Job	Run time
incremental_install	14m 14s
conda_test (3.11, ubuntu-latest)	10m 39s
test (1, 3.11, ubuntu-latest, main)	12m 11s
test (1.6, 3.7, ubuntu-latest, include)	17m 21s
Check types (3.11, ubuntu-latest)	1m 1s
Check types (3.7, ubuntu-latest)	33s
Indicate completion to coveralls.io	12s
	56m 11s

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