postcss.plugin was deprecated in v8

[JonnyVaine]

I'm getting the following warning in my webpack build since updating postcss to v8:

"postcss-cachebuster: postcss.plugin was deprecated. Migration guide: https://evilmartians.com/chronicles/postcss-8-plugin-migration"

Appreciate not everyone will be on version 8, but the push should be made. Can this be reflected in an update to this plugin?