Add Python 3.14 support

[acul71]

Description

This issue tracks adding Python 3.14 support to py-libp2p.

Current Status

Currently, py-libp2p supports Python versions 3.10, 3.11, 3.12, and 3.13 (as specified in pyproject.toml).

Tasks

To add Python 3.14 support, the following updates may be needed:

1. Update requires-python in pyproject.toml (currently >=3.10, <4.0 - should already allow 3.14)
2. Add Python 3.14 to the classifiers in pyproject.toml:
   • Programming Language :: Python :: 3.14
3. Update CI/CD workflows to test against Python 3.14
4. Verify all dependencies are compatible with Python 3.14
5. Run the test suite with Python 3.14 to ensure compatibility

Related

• Python 3.14 release information: https://www.python.org/downloads/
• Current Python version support: See pyproject.toml classifiers