* [x] Create `mediawiki/libs/Minify` repo.
* [x] Import history from mediawiki/core. I'll probably use git-filter-branch, with one or two retro renames if needed. We previously did this for CSSJanus, OOjs, OOUI, and VE which worked out well.
* Set up the project, see <https://www.mediawiki.org/wiki/Manual:Developing_libraries>
* [x] Create empty GitHub repo.
* [x] Fiddle with GitHub repo settings and description.
* [x] Create Phabricator tag, with herald rule for its steward (Performance-Team).
* [x] Add boilerplate for new repos (gitattributes, composer.json, Doxygen, etc.), and move code under `Wikimedia\Minify\` namespace.
* [x] Confirm boilerplate commit inits the GitHub mirror.
* [x] Enable php-composer jobs in CI, including Doxygen and code coverage.
* [x] Enable packagist hook on GitHub mirror. (Usually done automatically by after submission, by org-wide GitHub "app" for Packagist)
* [x] Add "wikimedia" user as package co-owner in Packagist.
* [x] Add to integration/docroot.
* [x] Add to mw:Maintainers.
* [x] Publish 2.0.0 with the current ES5 support and new namespace. (We may want to do a retro 1.0 at some point for the original ES3-complaint version)
* [ ] Add to mediawiki/vendor and switch ResourceLoader. Keep aliases within mediawiki/core for compat (these are considered internal, so we can probably remove then within a week or two, to be verified, can also keep an alias for one release if really needed, no problem, but we have a public entry point already that is implementation agnostic.)