Fix compatibility with Python 3.13 beta 2 #1328

Job	Run time
Test Lint	1m 6s
Test Docs	48s
Test Minimum Versions	44s
Build, test and code coverage (ubuntu-latest, 3.8)	2m 19s
Build, test and code coverage (ubuntu-latest, 3.11)	2m 9s
check_links	1m 17s
Build, test and code coverage (macos-latest, 3.8)	2m 40s
Build, test and code coverage (macos-latest, 3.11)	2m 12s
check_release	1m 32s
Build, test and code coverage (windows-latest, 3.8)	4m 10s
Make SDist	36s
Build, test and code coverage (windows-latest, 3.11)	6m 9s
Build, test and code coverage (windows-latest, 3.9)	4m 11s
Test Prereleases	2m 17s
Build, test and code coverage (ubuntu-latest, pypy-3.8)	7m 51s
Build, test and code coverage (ubuntu-latest, 3.12)	3m 1s
Build, test and code coverage (macos-latest, 3.10)	2m 24s
Install from SDist and Test	2m 3s
coverage	10s
tests_check	1s
	47m 40s

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