tests

ENH: add support for PEP 639 #2606

Job	Run time
cygwin (3.9)	7m 55s
homebrew (3.9)	1m 17s
mypy	12s
msvc (3.11)	3m 25s
homebrew (3.12)	1m 12s
pyston (3.8)	1m 27s
test (ubuntu-latest, 3.7)	1m 52s
test (ubuntu-latest, 3.13)	2m 24s
test (macos-13, 3.7)	3m 7s
test (macos-13, 3.13)	3m 22s
test (windows-latest, 3.7)	4m 36s
test (windows-latest, 3.13)	6m 3s
test (ubuntu-latest, pypy-3.9)	5m 37s
test (ubuntu-latest, pypy-3.10)	5m 45s
test (ubuntu-latest, 3.8)	1m 52s
test (ubuntu-latest, 3.9)	2m 10s
test (ubuntu-latest, 3.10)	2m 16s
test (ubuntu-latest, 3.11, ~=0.64.0)	2m 33s
test (ubuntu-latest, 3.11, ~=1.0.0)	2m 10s
test (ubuntu-latest, 3.11, ~=1.1.0)	2m 7s
test (ubuntu-latest, 3.12, ~=1.2.3)	2m 15s
test (ubuntu-latest, 3.12, ~=1.3.0)	2m 24s
test (ubuntu-latest, 3.12, ~=1.4.0)	2m 25s
test (ubuntu-latest, 3.12, ~=1.5.0)	2m 26s
test (ubuntu-latest, 3.12, @git+https://github.com/mesonbuild/meson.git)	2m 48s
test (windows-latest, 3.12, @git+https://github.com/mesonbuild/meson.git)	7m 7s
	1h 20m 47s

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