fix: usage of node12 which is deprecated in CI

[hamirmahal]

fixes #152.

[codspeed-hq]

CodSpeed Performance Report

Merging #153 will not alter performance

_{Comparing hamirmahal:fix/usage-of-node12-which-is-deprecated-in-CI (bb6032c) with main (419ec90)}

Summary

✅ 73 untouched benchmarks

[hamirmahal]

v4 is the latest major version of actions/checkout at the time of this writing.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.94%. Comparing base (419ec90) to head (bb6032c).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #153   +/-   ##
=======================================
  Coverage   90.94%   90.94%           
=======================================
  Files          12       12           
  Lines        2042     2042           
  Branches     2042     2042           
=======================================
  Hits         1857     1857           
  Misses        112      112           
  Partials       73       73           

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[davidhewitt]

Thanks

[hamirmahal]

You're welcome.