This reverts b8abb9b5f2 (a self-merged "experiment") and
1bb0ea4f76 (Convert entry point to use explicit globals).
The maintainers of this extension do not plan on supporting installation
via composer. This functionality was never included in a stable release
branch, and should not break anyone sticking to stable
branches.
Once merged, I can remove the package from packagist.org
The composer.json is now used to add a "composer test" entry point to run
PHPCS, which this extension badly needs.
Change-Id: I2f3db6addd883d94366a696d5185bf05b2695b11
