fix: ignore other prerelease tags when finding latest tag

[jaakkotuosa]

This relates to issue #211

If we have already git tags:

• v1.0.0-a.0
• v1.0.0-b.0
  and then try to determine the next tag for prerelease a, we get v1.0.0-a.0 (which already exists).
  This is because lib/latest-semver-tag.js was returning the latest tag, even if it was different prerelease (b in this case).

This PR adds filtering to remove prerelease tags for different prereleases, and only then selecting latest

[TimothyJones]

Thanks for this! Would you be able to add documentation for it to the readme, please?

[jaakkotuosa]

Thanks! As for documentation, I am not sure what would be useful. I guess we could say in https://github.com/absolute-version/commit-and-tag-version?tab=readme-ov-file#release-as-a-pre-release something like "you can use different prerelease names" (too obvious?) or then add an example block for beta release (but that would would pretty much identical to the block for the alpha release). Any ideas?

[TimothyJones]

Good point, this is probably just how people would expect it to work.

[TimothyJones]

Released in 12.5.1