Requirements

Node.js 8.x. Older versions might work, newer versions are known to have problems running the Gulp tasks.

Build status

Run npm version patch (or minor or major)
Run git push origin master --tags
Wait for the CI builds to complete (AppVeyor, Travis CI)
Go to GitHub releases
Add release notes and publish release
Run npm version prerelease
Run git push origin master --tags
Update the website with git checkout gh-pages && make update-readme update-and-push && git checkout master