Adopt PEP 639

[cdce8p]

Description

/CC @JonnyWong16 Followup to #1484 (comment)
Setuptools v77 added full support for PEP 639 license expressions.

Metadata diff

 ...
-License: BSD-3-Clause
+License-Expression: BSD-3-Clause
 ...
-Classifier: License :: OSI Approved :: BSD License
 ...

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the docstring for new or existing methods
• I have added tests when applicable

[cdce8p]

Setuptools uses a custom version of wheel so the requirement here isn't used anymore.

[JonnyWong16]

Thanks.

[cdce8p]

The test failure seems to be unrelated.