tests

CI: upgrade versions of Sphinx and Furo used for doc build #2334

Job	Run time
cygwin (3.9)	5m 57s
homebrew (3.8)	2m 4s
mypy	19s
homebrew (3.11)	2m 15s
msvc (3.11)	2m 37s
pyston (3.8)	1m 6s
test (ubuntu, 3.7)	1m 20s
test (ubuntu, 3.12)	1m 53s
test (macos, 3.7)	2m 16s
test (macos, 3.12)	2m 26s
test (windows, 3.7)	3m 34s
test (windows, 3.12)	4m 16s
test (ubuntu, pypy-3.9)	4m 25s
test (ubuntu, pypy-3.10)	4m 28s
test (ubuntu, 3.8)	1m 28s
test (ubuntu, 3.9)	1m 30s
test (ubuntu, 3.10)	1m 27s
test (ubuntu, 3.11, ~=0.63.3)	2m 26s
test (ubuntu, 3.11, ~=0.64.0)	1m 55s
test (ubuntu, 3.11, ~=1.0.0)	1m 40s
test (ubuntu, 3.11, ~=1.1.0)	1m 31s
test (ubuntu, 3.12, ~=1.2.3)	1m 34s
test (ubuntu, 3.12, @git+https://github.com/mesonbuild/meson.git)	1m 57s
test (windows, 3.12, @git+https://github.com/mesonbuild/meson.git)	4m 19s
	58m 43s

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