versionize 0.1.9

A version tolerant serialization/deserialization framework.
Documentation
## Reason for This PR

`[Author TODO: add issue # or explain reasoning.]`

## Description of Changes

`[Author TODO: add description of changes.]`

## 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`.