Support for border-image-* properties

[MarkusWendorf]

The border-image property can be quite useful but it seems to be missing in Tailwind.

border-image
border-image-source
border-image-slice
border-image-width
border-image-outset
border-image-repeat

[sebagnz]

I created a plugin to add utilities for border-image and all its properties. Hope it's useful 😁.