Tag schemes with a version to make the release process for packagers easier

[DamienCassou]

For packagers of base16-schemes, it would be good to tag the latest commit. Thank you.

[belak]

Hello! Sorry it's taken so long to get to this.

We've migrated to a new schemes repo but this issue is still relevant, so I'm following up.

As a packager, do you have any specifics you're looking for? A specific version? Tracking breaking changes?

[DamienCassou]

If you could just git tag a known-to-work commit with something like "v1.0.0" (or a different version number), this would make packagers happy. The next best things is to follow https://semver.org/ and to maintain a changelog.