fix: remove please-upgrade-node

[filmaj]

fixes #1274

Instead of pulling in an extra dependency to massage node version incompatibilities, I say we just rely on the node/npm tooling (in particular: the engines property of package.json) to do that work for us. Would help us in fixing issues like #1274 (people using weird bundlers and deploying to constrained runtimes).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.59%. Comparing base (ffabf3c) to head (2910194).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2221   +/-   ##
=======================================
  Coverage   81.59%   81.59%           
=======================================
  Files          19       19           
  Lines        1646     1646           
  Branches      464      464           
=======================================
  Hits         1343     1343           
  Misses        194      194           
  Partials      109      109           

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[zimeg]

👏 Nice find - one less dependency always a good feeling! I also agree that this is a task for the engines 🚂 💨