Change Details

Unit tests. Tested in real conditions with: ``` $ php artisan tinker Psy Shell v0.7.2 (PHP 5.6.16-1+deb.sury.org~trusty+1 — cli) by Justin Hileman >>> $factory = App::make('dockerhub'); => Keruald\DockerHub\Build\TriggerBuildFactory {#668} >>> $factory->build('nasqueron/aphlict'); => null >>> $factory->build('nasqueron/aphlictx'); InvalidArgumentException with message 'No token found for image nasqueron/aphlictx.' >>> DockerHub::build('nasqueron/auth-grove'); => null ```