Problem with using plugin-shadow

[thurd]

I'm having a problem with using plugin-shadow, that seems to be a part of the main branch now.
My most basic scenario is as follows:
`const { Jimp } = require("jimp");

function()
const image = await Jimp.read(__dirname+"\test.png");
image.shadow()
image.write(__dirname+"test_shadow.jpg");Throws me an error:image.shadow()
^

TypeError: image.shadow is not a function`

npm tells me I have [email protected], I even installed @jimp/[email protected] but can't seem to get it to work with the rest of my code. I've tried using configure but that lead to another class of errors.