Checkout the main branch.
If you do not have sign-git-tag enabled run:
npm config set sign-git-tag true
Update the version in package.json and create a Git tag by running:
npm version $VERSION
where $VERSION is the version that will be published on both PyPI and NPM, e.g. 0.2.0-rc.0 or 0.2.0.
The Git tag will automatically have a v prefix: v$VERSION.
Push main and the new tag to the git remote:
git push origin main --follow-tags
The packages will be published by a GitHub workflow.