Support Python 3.14 #3991

Job	Run time
checks / pre-commit	31s
checks / readme-snippets	12s
checks / test (3.12, highest, windows-latest)	3m 18s
checks / test (3.10, lowest-direct, windows-latest)	2m 11s
checks / test (3.10, lowest-direct, ubuntu-latest)	44s
checks / test (3.11, lowest-direct, ubuntu-latest)	45s
checks / test (3.12, lowest-direct, windows-latest)	3m 23s
checks / test (3.14, highest, ubuntu-latest)	1m 12s
checks / test (3.14, lowest-direct, windows-latest)	2m 16s
checks / test (3.10, highest, windows-latest)	2m 20s
checks / test (3.11, highest, ubuntu-latest)	46s
checks / test (3.13, lowest-direct, windows-latest)	2m 23s
checks / test (3.11, highest, windows-latest)	2m 32s
checks / test (3.10, highest, ubuntu-latest)	48s
checks / test (3.13, lowest-direct, ubuntu-latest)	44s
checks / test (3.12, highest, ubuntu-latest)	51s
checks / test (3.13, highest, windows-latest)	2m 59s
checks / test (3.11, lowest-direct, windows-latest)	3m 6s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 7s
checks / test (3.13, highest, ubuntu-latest)	43s
checks / test (3.14, highest, windows-latest)	2m 22s
checks / test (3.12, lowest-direct, ubuntu-latest)	49s
	36m 2s

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