John Ericson

Seems SWC is now using floating-ui (successor to popper). The equivalent plugin/middleware is called [detectOverflow](https://floating-ui.com/docs/detectoverflow).

I'm seeing the same error (with 2.1.0) using the postcss-lit custom syntax for expressions like this ```js css` @media (min-width: 500px) and ${namedMedia.css.mobile} { /* ... */ } ` ```...

Created #52 to track this.

Thanks @b100dian. @kurttheviking are you good with merging this fix?

Fixes #68