[WIP] Enhance cross-version support

[wllenyj]

Reason for This PR

This pr is for https://github.com/firecracker-microvm/versionize_derive/pull/23

If this proposal is accepted, I will do a complete job.

Description of Changes

See https://github.com/firecracker-microvm/versionize_derive/pull/23 for details.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

PR Checklist

[Author TODO: Meet these criteria.] [Reviewer TODO: Verify that these criteria are met. Request changes if not]

• [ ] All commits in this PR are signed (git commit -s).
• [ ] The reason for this PR is clearly provided (issue no. or explanation).
• [ ] The description of changes is clear and encompassing.
• [ ] Any required documentation changes (code and docs) are included in this PR.
• [ ] Any newly added unsafe code is properly documented.
• [ ] Any user-facing changes are mentioned in CHANGELOG.md.