See all the versions at https://packaging.python.org/en/latest/specifications/core-metadata/#metadata-version, and to support all of these:

• Search github for METADATA files (or look for these in pypi installed wheels) with the specific version of metadata like: Metadata-Version: 2.4 and add examples of these to test
• Compare between the different metadata versions and support newer attributes if any

Follow up on #4174