build: update node and npm engines versions

[nextcloud-command]

Automated update of the npm and node engines versions according to Nextcloud standards.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.60%. Comparing base (8f4cd15) to head (c010529).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #846   +/-   ##
=======================================
  Coverage   90.60%   90.60%           
=======================================
  Files          56       56           
  Lines        2660     2660           
  Branches      498      498           
=======================================
  Hits         2410     2410           
  Misses        224      224           
  Partials       26       26           

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