Adopting semver for releases

[shawnHartsell]

Currently, this project uses calendar based versioning for tags and releases. Calver has several drawbacks, most notably the ability to communicate breaking changes. I'm writing this to gauge the communities/maintainers thoughts on adopting semver instead.

Since this project isn't fast moving I think this can be non in a non-intrusive way. For example, if we decided to do this we can cut a final calendar version and a v1.0.0 at the same SHA and then use semver going forward.