refactor: drop python 3.9 support

[linuxdaemon]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.12%. Comparing base (f25e657) to head (266ab43).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #178      +/-   ##
==========================================
+ Coverage   72.81%   73.12%   +0.31%     
==========================================
  Files           6        6              
  Lines         548      547       -1     
  Branches       91       90       -1     
==========================================
+ Hits          399      400       +1     
+ Misses        113      111       -2     
  Partials       36       36              

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