Versioned Documentation

# Bugs and Questions

### Checklist

- [X] This is not a `victory-native` specific issue. (Issues that only appear in `victory-native` should be opened [here](https://github.com/FormidableLabs/victory-native/issues/new))

- [X] I have read through the [FAQ](https://formidable.com/open-source/victory/docs/faq) and [Guides](https://formidable.com/open-source/victory/guides/) before asking a question

- [X] I am using the latest version of Victory

- [X] I've searched open issues to make sure I'm not opening a duplicate issue

### The Problem

Is there any possibility of having versioned documentation? Or at the very least, mention what version your documentation page is referring to? I realize there is the landing page with the version/downloads chart, but that just points to CHANGELOG again.

In the past, I had to support an older victory version in an app at my company, and I had to use a combination of way back machine, and the CHANGELOG, to calculate how to do something or why a prop was not working.

By at least marking what version your docs are currently for, the way back machine will be able to view it when its captured