Fix ci.yml (and some improvements)

[alexv-ds]

For the last 4 months, all attempts to run workflow have failed with an error:

 Error: Unable to find Node version '14' for platform darwin and architecture arm64

This PR fixes that.

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Changes:

• Exclusion (macos-latest, node-14) from the test job matrix (Unable to find Node version '14' error fix)
• Adding nodejs versions 20 and latest (currently 22) to the testing matrix
• Enabling caching for setup-alpine

[alexv-ds]

@mcollina approve it 🙂