v4.9.0

Changes

• Use uv instead of setup-python action to install Python. On all platforms but windows-2019.
• Remove auto-generated dummy pyproject.toml used to hack setup-python caching.
• Run all jobs on Python 3.13.
• Move coverage configuration to pytest invocation.
• Do not let uv sync operation update the uv.lock file.
• Depends on released version of mdformat_deflist.

🐍 Available on PyPi.