Add support for Python 3.14 (#843) #1896

Job	Run time
lint	45s
old-dependencies	53s
test (ubuntu-latest, 3.12.11)	1m 36s
test (macos-latest, 3.14.0, --cov-fail-under=100)	1m 24s
test (ubuntu-latest, 3.11.13)	2m 2s
test (ubuntu-latest, 3.13.7)	1m 4s
test (ubuntu-latest, 3.14.0, --cov-fail-under=100)	1m 32s
test (windows-latest, 3.14.0, --cov-fail-under=100)	3m 4s
test (ubuntu-latest, 3.10.18)	2m 11s
build / build	24s
attest	7s
check / check	4s
deploy	0s
	15m 6s

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