Add 3.14 to project classifiers and tox.ini (#604) #2057

Job	Run time
Lint	8s
Run tests (3.9)	7s
Run tests (3.9.12)	12s
Run tests (3.10)	5s
Run tests (3.10.4)	15s
Run tests (3.11)	6s
Run tests (3.11.0)	13s
Run tests (3.12)	7s
Run tests (3.12.0)	13s
Run tests (3.13)	5s
Run tests (3.13.0)	16s
Run tests (3.14)	17s
Run tests (pypy3.9)	9s
Run tests (pypy3.10)	10s
Create an issue if daily tests failed	0s
	2m 23s

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