Linux

Install `typing_extensions` for compatibility with Python 3.7 #1392

Job	Run time
incremental_install	14m 8s
test (1, 3.11, ubuntu-latest, main)	6s
test (1.6, 3.7, ubuntu-latest, include)	3s
conda_test (3.9, ubuntu-latest)	9m 59s
Check types (3.11)	2m 28s
Indicate completion to coveralls.io	0s
	26m 44s

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