Update CI actions

[kmilos]

Most updated to node16 as node 12 is going EOL in April

[codecov]

Codecov Report

Merging #2143 (e7c55d1) into main (5c36c69) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2143   +/-   ##
=======================================
  Coverage   63.31%   63.31%           
=======================================
  Files          97       97           
  Lines       19127    19127           
  Branches     9713     9713           
=======================================
  Hits        12111    12111           
  Misses       4748     4748           
  Partials     2268     2268           

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[piponazo]

LGTM! Thanks

[kmilos]

Thanks for the quick reviews!

[postscript-dev]

@kmilos:
I noticed that the Exiv2 nightly releases stopped being published after this PR was merged. The release workflow shows that there are problems in the Build Linux Release and Build Windows Release sections but the Build macOS Release works well.

I think that the changes made in this PR are justified but perhaps there is an unintended side-effect to them?

[kmilos]

No idea if these are indeed related. From the list, it doesn't look like those releases are/were regular/scheduled, and certainly not "nightly"...

[postscript-dev]

@kmilos:
Thanks for looking at this, GitHub actions are not my area of expertise. I suggested the link between the problems and the PR, only because the dates matched. The real cause could be something else.