How to publish an update to npm

Create an account at https://www.npmjs.com
From the console, run npm login, and log in using your new account.
Ask the package manager to add you as a collaborator.
Run these commands:

cd path/to/repo
git checkout master
git pull
npm version patch -m "Preparing for publish" # see https://docs.npmjs.com/cli/version
git push
npm publish

All done! Verify at https://www.npmjs.com/package/{packagename}