Could not find io.github.onyxstudios.Cardinal-Components-API:cardinal-components-base:3.0.0-nightly.21w19a.
Required by:
project : > dev.emi:trinkets:3.0.0

Not a big deal but just thought you should know so you can update your instructions.

Alternatively, I think you need to just update the line before your example code on the readme. I didn't copy that code, I added jitpack and nerdhubmc instead like the old versions.