Log Message:
py-rsa: updated to 4.8

Version 4.8

- Switch to [Poetry](https://python-poetry.org/) for dependency and release \ 
management.
- Compatibility with Python 3.10.
- Chain exceptions using `raise new_exception from old_exception`
- Added marker file for PEP 561. This will allow type checking tools in \ 
dependent projects
  to use type annotations from Python-RSA
- Use the Chinese Remainder Theorem when decrypting with a private key. This
  makes decryption 2-4x faster