chore: bump min node version to v18

[nfischer]

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[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.33%. Comparing base (ee29f52) to head (9f73aea).
Report is 1 commits behind head on main.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #47   +/-   ##
=======================================
  Coverage   79.33%   79.33%           
=======================================
  Files           6        6           
  Lines         629      629           
=======================================
  Hits          499      499           
  Misses        130      130           

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