tests

ENH: add support for PEP 639 #2603

Job	Run time
mypy	11s
msvc (3.11)	3m 15s
cygwin (3.9)	6m 47s
homebrew (3.9)	1m 23s
homebrew (3.12)	1m 21s
pyston (3.8)	1m 39s
test (ubuntu-latest, 3.7)	1m 43s
test (ubuntu-latest, 3.13)	2m 32s
test (macos-13, 3.7)	4m 22s
test (macos-13, 3.13)	3m 25s
test (windows-latest, 3.7)	4m 15s
test (windows-latest, 3.13)	7m 5s
test (ubuntu-latest, pypy-3.9)	5m 31s
test (ubuntu-latest, pypy-3.10)	5m 53s
test (ubuntu-latest, 3.8)	1m 51s
test (ubuntu-latest, 3.9)	2m 7s
test (ubuntu-latest, 3.10)	2m 0s
test (ubuntu-latest, 3.11, ~=0.64.0)	2m 32s
test (ubuntu-latest, 3.11, ~=1.0.0)	2m 17s
test (ubuntu-latest, 3.11, ~=1.1.0)	2m 9s
test (ubuntu-latest, 3.12, ~=1.2.3)	2m 17s
test (ubuntu-latest, 3.12, ~=1.3.0)	2m 19s
test (ubuntu-latest, 3.12, ~=1.4.0)	2m 28s
test (ubuntu-latest, 3.12, ~=1.5.0)	2m 24s
test (ubuntu-latest, 3.12, @git+https://github.com/mesonbuild/meson.git)	2m 39s
test (windows-latest, 3.12, @git+https://github.com/mesonbuild/meson.git)	7m 13s
	1h 21m 38s

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