On CLM scan tools such as Sonartype, indexing of license setup takes into consideration the current status of the license on Pypi.org. Currently, two classifiers are added:

That leads the scan tools to index this package as non compliant as it's using a very generic classifier.

Sonartype response to this package:

• oauthlib: The Non-Standard is populated for the PyPI component oauthlib-3.2.2, which contains the following string in the associated `PKG-INFO`_ file under the _License Classifier section:
 
Classifier: License :: OSI Approved

The said string "OSI Approved" is mapped to an UNKNOWN as it is highly generic and can't be mapped to a specific license.

This PR makes sure that oauthlib is promptly returning only "License :: OSI Approved :: BSD License" and allow scan tools to make sure this lib is safe in regards to licensing.

Other repos for reference:

https://github.com/ets-labs/python-dependency-injector/blob/6e4794bab18fef3ffbc6a11bee526fe24688286f/pyproject.toml#L30
https://github.com/lepture/authlib/blob/4eafdc21891e78361f478479efe109ff0fb2f661/pyproject.toml#L21
https://github.com/gweis/isodate/blob/17cb25eb7bc3556a68f3f7b241313e9bb8b23760/pyproject.toml#L11