* Create migrate-colors-primer-18.js
* Update colors round 1
* upgrade primer packages
* Update index.scss
* Replace auto colors
* remove btn-primary-matte
* Turns out the class names and variables names DONT LINE UP... ugh....
* Check for allowed var colors
* pull changes from docs-playground
* cleanup, add callout banner
* cleanup linting and test fixes
* add discussion link
Co-authored-by: James M. Greene <JamesMGreene@github.com>
