Bump websockets from 12.0 to 13.0

Bumps websockets from 12.0 to 13.0.

Release notes

Sourced from websockets's releases.

13.0

See https://websockets.readthedocs.io/en/stable/project/changelog.html for details.

Commits

• 323adef Migrate to actions/upload-artifact@v4.
• f9c20d0 Avoid deleting .so files in .direnv or equivalent.
• 4d0e0e1 Build sdist and arch-independent wheel with build.
• 0019943 Release version 13.0.
• 12fa8bc Complete changelog with changes since 12.0.
• 9d355bf Remove unnecessary code paths in keepalive().
• 453e55a Standardize on raise AssertionError(...).
• 9e5b91b Improve documentation of latency.
• 8eaa5a2 Document & test process_response modifying the response.
• 09b1d8d Fix tests on Python < 3.10.
• Additional commits viewable in compare view