Support Python 3.14 #3997

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	31s
checks / test (3.10, lowest-direct, ubuntu-latest)	48s
checks / test (3.11, highest, ubuntu-latest)	45s
checks / test (3.11, lowest-direct, ubuntu-latest)	50s
checks / test (3.10, highest, windows-latest)	2m 28s
checks / test (3.11, highest, windows-latest)	2m 27s
checks / test (3.12, highest, ubuntu-latest)	54s
checks / test (3.11, lowest-direct, windows-latest)	2m 22s
checks / test (3.12, lowest-direct, windows-latest)	3m 27s
checks / test (3.12, lowest-direct, ubuntu-latest)	49s
checks / test (3.10, lowest-direct, windows-latest)	2m 32s
checks / test (3.10, highest, ubuntu-latest)	48s
checks / test (3.14, highest, ubuntu-latest)	1m 17s
checks / test (3.13, lowest-direct, ubuntu-latest)	41s
checks / test (3.14, lowest-direct, windows-latest)	2m 12s
checks / test (3.13, lowest-direct, windows-latest)	2m 20s
checks / test (3.13, highest, windows-latest)	2m 30s
checks / test (3.14, highest, windows-latest)	2m 27s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 15s
checks / test (3.12, highest, windows-latest)	3m 57s
checks / test (3.13, highest, ubuntu-latest)	44s
	36m 15s

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