pyproject-metadata 0.8.0rc1 on Python PyPI

What's Changed

Support specifying the metadata_version as 2.1, 2.2, or 2.3
Always normalize extras following PEP 685
Preserve the user-specified name style in the metadata. .canonical_name added to get the normalized name
Require "version" in the dynamic table if unset (following PEP 621)
Support extras using markers containing "or"
Support empty extras
Using .as_rfc822() no longer modifies the metadata object
Fix email-author listing for names containing commas
Validate the description is one line
Separate core metadata keywords with commas, following the (modified) spec
An error message reported project.license instead of project.readme
Produce slightly cleaner tracebacks
The build backend is now flit-core

Full Changelog: https://github.com/pypa/pyproject-metadata/commits/0.8.0rc1