Update Node versions used on GitHub Actions

[coliff]

Use v14, v16 and v18.
REF: https://github.com/nodejs/release#release-schedule

[codecov]

Codecov Report

Merging #1283 (5d0295e) into master (02edc57) will not change coverage.
The diff coverage is n/a.

❗ Current head 5d0295e differs from pull request most recent head 1487458. Consider uploading reports for the commit 1487458 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1283   +/-   ##
=======================================
  Coverage   99.07%   99.07%           
=======================================
  Files           2        2           
  Lines        1627     1627           
  Branches      332      332           
=======================================
  Hits         1612     1612           
  Misses         15       15           

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[coliff]

is this good to merge @nschonni @thedaviddias ?

[nschonni]

Same comment as #1202 (comment)
I think it makes sense, but dropping supported versions is usually a semver major change, so it needs a version bump. It would probably be the time to include the other breaking change in #728

[coliff]

Same comment as #1202 (comment) I think it makes sense, but dropping supported versions is usually a semver major change, so it needs a version bump. It would probably be the time to include the other breaking change in #728

Ok - thanks for feedback and suggestion. Updated now and all tests are passing! 👍