Build

Add prerelease testing for CPython 3.13 to CI #457

Job	Run time
Build sdist	1m 23s
Test flint v3.0.0	5m 23s
pip install . on 3.11	5m 2s
Test flint main	7m 9s
Build wheels for ubuntu-20.04	6m 32s
pip install python-flint on 3.11	6m 19s
Build wheels for windows-2019	19m 28s
pip install . on 3.12	6m 12s
pip install python-flint on 3.12	6m 25s
pip install . on 3.13-dev	5m 6s
Build wheels for macos-12	9m 20s
pip install python-flint on 3.13-dev	7m 5s
Test rst docs	6s
Test 3.9 wheel on ubuntu-20.04	5s
Test 3.10 wheel on ubuntu-20.04	2s
Test 3.11 wheel on ubuntu-20.04	5s
Test 3.12 wheel on ubuntu-20.04	2s
Test 3.9 wheel on windows-2019	5s
Test 3.10 wheel on windows-2019	4s
Test 3.11 wheel on windows-2019	4s
Test 3.12 wheel on windows-2019	3s
Test 3.9 wheel on macos-12	7s
Test 3.10 wheel on macos-12	6s
Test 3.11 wheel on macos-12	7s
Test 3.12 wheel on macos-12	6s
	1h 26m 26s

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