uv

d4f1973b - Allow empty extras in `pep508-rs` and add more corner case to tests (#2128)

Allow empty extras in `pep508-rs` and add more corner case to tests (#2128) ## Summary Fixes #2127, allow empty extras, and add more corner case to tests ## References - [PEP 508 grammar](https://peps.python.org/pep-0508/#complete-grammar)