start testing on 3.13 #2612

Job	Run time
check_release	1m 39s
build (ubuntu-latest, 3.9)	3m 5s
build (ubuntu-latest, 3.13)	3m 32s
link_check	3m 37s
build (windows-latest, 3.9)	10m 2s
build (windows-latest, 3.13)	10m 49s
build (macos-latest, 3.9)	3m 45s
Make SDist	28s
test_docs	38s
build (macos-latest, 3.13)	2m 49s
build (ubuntu-latest, pypy-3.9)	3m 0s
Test Lint	58s
build (macos-latest, 3.10)	4m 5s
build (ubuntu-latest, 3.11)	3m 6s
Test Minimum Versions	30s
build (ubuntu-latest, 3.12)	3m 31s
Test Prereleases	2m 16s
test_without_debugpy (ubuntu-latest, 3.9)	2m 8s
Install from SDist and Test	1m 56s
coverage	0s
tests_check	4s
	1h 1m 58s

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