doiuse with an empty configuration breaks (this bug possibly also breaks other plugins)

[LorenzoBloedow]

I'm trying to figure out two things:

1. Why is this the way postcss-load-config treats empty configuration objects
2. Is this choice currently breaking more plugins?

All the context you need is in this pull request I just opened.

Minimal repro:

1. Access https://stackblitz.com/edit/vitejs-vite-f8xwph
2. Run npm run build
3. Notice doiuse is skipped without warning even though postcss.config.js is perfectly valid.

[ai]

There is no specific policy. PostCSS is old project with big ecosystem and contains many parts—this is the result:

1. postcss has big ifs block in plugins loading because we need to support PostCSS 8 plugins, PostCSS 7 plugins, old PostCSS plugins, plugins presets. Also plugins with options (plugin(opts)) and without (plugin)
2. postcss-load-config was written by other developer and some use case could be missed

So, suggest the solution.