Deprecated license classifier in project metadata

[btschwertfeger]

The project defines a proper SPDX-compliant license in its metadata:

python-qrcode/pyproject.toml

Line 12 in f92c007

license = { text = "BSD-3-Clause" }

but still reports the deprecated license classifier:

python-qrcode/pyproject.toml

Line 17 in f92c007

"License :: OSI Approved :: BSD License",

I'm happy to provide a PR to drop that classifier after approval!

References:

• https://peps.python.org/pep-0639/#deprecate-license-classifiers