Import from .postcss files

[RedHatter]

The importFrom option can take css, scss, and pcss however doesn't look like it supports postcss files. This is what I use and I've seen it as a common extension to use. Can .postcss be supported?

Thank you.

[romainmenke]

@RedHatter Can you give us an authoritative source for this?
see : https://twitter.com/postcss/status/661645290622083073?lang=en