Add license to package classiers (#845) #536

Job	Run time
Python 3.7 on macos-13	2m 54s
Linux docs	1m 12s
Python 3.13-dev on macos-13	3m 28s
Python 3.7 on Windows x86	2m 0s
Linux meta	1m 7s
Python 3.13-dev (minimal build) on macos-13	3m 33s
Python 3.8 on Windows x86	2m 18s
Linux mypy	1m 6s
Python 3.13-dev on macos-latest	1m 46s
Python 3.9 on Windows x86	1m 58s
Linux pypy3	2m 58s
Python 3.13-dev (minimal build) on macos-latest	1m 37s
Python 3.10 on Windows x86	3m 4s
Linux pypy3	2m 44s
Python 3.11 on Windows x86	1m 58s
Linux py37	1m 41s
Python 3.12 on Windows x86	3m 28s
Linux py38	1m 44s
Python 3.13-dev on Windows x86	2m 45s
Linux py39	1m 44s
Python 3.7 on Windows x64	2m 19s
Linux py310	1m 50s
Python 3.8 on Windows x64	1m 43s
Linux py311	1m 43s
Python 3.9 on Windows x64	1m 41s
Linux py312	1m 52s
Linux py313	1m 55s
Python 3.10 on Windows x64	2m 4s
Linux py313 system	2m 39s
Python 3.11 on Windows x64	2m 13s
Linux py313 minimal	1m 49s
Python 3.12 on Windows x64	2m 15s
Python 3.13-dev on Windows x64	2m 49s
	1h 11m 57s

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