You'll need a working installation of git-extras for this.
Compile interesting highlights from git changelog
into Changelog.md
git changelog --no-merges
git authors --list > AUTHORS
Update package.json and create a new tag.
$ npm version x.y.z
$ npm publish
cp Changelog.txt ../sinon-docs/resources/public/.
cp pkg/* ../sinon-docs/resources/public/releases/.
cd ../sinon-docs && ./publish.sh