Story

As a developer working on rpmautospec,
I want that it uses a recent Python baseline,
so I can use new features.

Acceptance Criteria

• Package metadata is updated to require version Python >= 3.9
• (If applicable:) Features available in Python 3.9 over 3.6 are used where sensible.

Background

Python 3.9 is the baseline Python in EL9 which is the oldest Python version rpmautospec is built for at the moment.