Issue #595: Update composer.json file.
Issue #595: Update composer.json file.

veewee/grumphp,veewee/grumphp,Big-Shark/grumphp,phpro/grumphp,phpro/grumphp,Big-Shark/grumphp,janvernieuwe/grumphp,janvernieuwe/grumphp,tombevers/grumphp,tombevers/grumphp