include python 3.13 in build #994

Job	Run time
docs	1m 51s
lint	1m 33s
Rustfmt	10s
Rust unit tests (ubuntu-latest)	2m 28s
typecheck	1m 23s
Rust unit tests (macos-latest)	1m 29s
test (macos-latest, 3.9)	4m 7s
Rust unit tests (windows-latest)	4m 30s
test (macos-latest, 3.10)	4m 12s
test (macos-latest, 3.11)	4m 17s
test (macos-latest, 3.12)	5m 7s
test (macos-latest, 3.13.0-alpha - 3.13)	5m 25s
test (ubuntu-latest, 3.9)	5m 23s
test (ubuntu-latest, 3.10)	5m 28s
test (ubuntu-latest, 3.11)	5m 55s
test (ubuntu-latest, 3.12)	8m 10s
test (ubuntu-latest, 3.13.0-alpha - 3.13)	8m 40s
test (windows-latest, 3.9)	8m 3s
test (windows-latest, 3.10)	8m 8s
test (windows-latest, 3.11)	10m 59s
test (windows-latest, 3.12)	11m 2s
test (windows-latest, 3.13.0-alpha - 3.13)	28m 47s
	2h 17m 7s

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