chore(ci): use builtin dependency caching

[SimenB]

Purpose (TL;DR) - mandatory

See https://github.com/actions/setup-node/blob/main/README.md#caching-packages-dependencies

[codecov[bot]]

Codecov Report

Merging #403 (49dc50d) into master (f434b69) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #403   +/-   ##
=======================================
  Coverage   93.85%   93.85%           
=======================================
  Files           1        1           
  Lines         586      586           
=======================================
  Hits          550      550           
  Misses         36       36           

Flag	Coverage Δ
unit	93.85% <ø> (ø)

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[fatso83]

Nice 👍

[mroderick]

Thank you ❤️