Add setup-node step

[ndrezn]

I hope this resolves the issues publishing to NPM. See: https://docs.github.com/en/actions/use-cases-and-examples/publishing-packages/publishing-nodejs-packages

[Copilot]

Pull Request Overview

This PR adds a new step to set up the Node.js environment with actions/setup-node@v4 to address issues related to publishing packages to npm.

• Adds the actions/setup-node step with node-version '20.x' and the registry-url for npm.

[BSd3v]

💃
As long as it works. 🙂

[ndrezn]

We'll find out next release hah