Empty Composer packages

If you find composer packages missing on the server, make sure they're not installed as submodules or subtrees or what have you.

They're a gnarly pain in the ass and since we can't guarantee the availability of composer on the web server, it's just not for us.

You can install Composer packages with the --prefer-dist flag to get a copy in your repo.

composer update --prefer-dist

That should do it.