Tests

Add tox environment for doctest (#1870) #935

Job	Run time
static-code-analysis	41s
format	18s
docs	42s
Packaging	17s
test (ubuntu-latest, false, 3.8)	2m 39s
test (ubuntu-latest, false, 3.9)	2m 55s
test (ubuntu-latest, false, 3.10)	2m 39s
test (ubuntu-latest, false, 3.11)	2m 48s
test (ubuntu-latest, false, 3.12)	2m 41s
test (ubuntu-latest, false, 3.13)	2m 51s
test (ubuntu-latest, false, pypy-3.9)	1m 59s
test (ubuntu-latest, false, pypy-3.10)	1m 55s
test (macos-latest, false, 3.8)	1m 53s
test (macos-latest, false, 3.9)	1m 28s
test (macos-latest, false, 3.10)	1m 25s
test (macos-latest, false, 3.11)	1m 30s
test (macos-latest, false, 3.12)	1m 41s
test (macos-latest, false, 3.13)	1m 54s
test (macos-latest, false, pypy-3.9)	1m 58s
test (macos-latest, false, pypy-3.10)	2m 14s
test (windows-latest, false, 3.8)	2m 5s
test (windows-latest, false, 3.9)	2m 27s
test (windows-latest, false, 3.10)	1m 58s
test (windows-latest, false, 3.11)	2m 26s
test (windows-latest, false, 3.12)	2m 10s
test (windows-latest, false, 3.13)	2m 47s
test (windows-latest, false, pypy-3.9)	2m 7s
test (windows-latest, false, pypy-3.10)	3m 16s
Release to PyPi	0s
coveralls	7s
	55m 51s

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