net/py-ripe.atlas.tools: Update to 3.1.1
- Switch to DISTVERSION
- Use pep517 build
- Add pytest tests
- Take maintainership for the time being
ChangeLog: https://pypi.org/project/ripe.atlas.tools/3.1.1/#history
PR: 277936
Reported by: Marek Zarychta <zarychtam@plan-b.pwste.edu.pl>