ci: update tested Node.js versions

[targos]

No description provided.

[codecov-commenter]

Codecov Report

Merging #906 (40947b0) into main (153d6dd) will increase coverage by 1.30%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #906      +/-   ##
==========================================
+ Coverage   95.15%   96.45%   +1.30%     
==========================================
  Files          28       28              
  Lines        2145     2145              
==========================================
+ Hits         2041     2069      +28     
+ Misses        104       76      -28     

Impacted Files	Coverage Δ
lib/bin/citgm-all.js	95.37% <0.00%> (+0.84%)	⬆️
lib/bin/citgm.js	100.00% <0.00%> (+1.80%)	⬆️
lib/match-conditions.js	94.00% <0.00%> (+4.00%)	⬆️
lib/spawn.js	100.00% <0.00%> (+76.92%)	⬆️

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[Trott]

Should we consider using https://github.com/pkgjs/action/blob/main/docs/USAGE.md to automatically update the test matrix as new versions are released and old versions go EOL? It's not immediately obvious from the docs, but it defaults to currently-supported Node.js versions.

[BethGriggs]

Should we consider using https://github.com/pkgjs/action/blob/main/docs/USAGE.md to automatically update the test matrix as new versions are released and old versions go EOL? It's not immediately obvious from the docs, but it defaults to currently-supported Node.js versions.

Refs: #891