Primarily because installing `git` hooks are easy to forget for
maintainers, whilst telling `npm` to do something as a consequence of
`$ npm version <patch | minor | major>` is seamless.
Also worth mentioning we what we used to do in the pre-commit hook
script is now greatly simplified as we don't want to have the build
output and/or the `.min.js` in git anymore.
Therefore, as long as we've bumped the version number in the source
code, we're basically done, after having amended that change into the
git commit the `npm` CLI creates.
Phillip Johnsen