PostCSS 8

Created by: ai

Is your proposal related to a problem?

PostCSS 8 was released. It added a new plugin API. Right now Gatsby does not support PostCSS 8 plugins.

Describe the solution you'd like

Updating postcss-loader and adding postcss to dependencies will fix the problem.

Describe alternatives you've considered

N/A

Additional context

PostCSS 8 changelog does not have breaking changes related to CRA 4 only removing Node.js 6 and 8 support).