refactor!: minimum supported Node.js version is 20.9.0

[alexander-akait]

Summary

fixes #422

What kind of change does this PR introduce?

refactor

Did you add tests for your changes?

Existing

Does this PR introduce a breaking change?

Yes

If relevant, what needs to be documented once your changes are merged or what have you already documented?

Nothing

Use of AI

No

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.38%. Comparing base (1ac5578) to head (09a808f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #423   +/-   ##
=======================================
  Coverage   93.38%   93.38%           
=======================================
  Files           1        1           
  Lines         121      121           
  Branches       48       47    -1     
=======================================
  Hits          113      113           
  Misses          7        7           
  Partials        1        1           

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