composer require zergbz1988/laravel-calc --dev
php artisan vendor:publish --provider="Zergbz1988\Calc\CalcServiceProvider"
'calcClass' => '{YOUR_CLASS}'
YOUR_CLASS
must implement Zergbz1988\Calc\Interfaces\Calc
gitlab-runner exec docker test:5.4
gitlab-runner exec docker test:5.5
gitlab-runner exec docker test:5.6
gitlab-runner exec docker test:7.0
gitlab-runner exec docker test:7.1
gitlab-runner exec docker test:7.2
P.S. Php 5.3 testing was removed due to composer memory issue (php -d memory_limit=-1 composer.phar didn't help).
http://your-app-host/calc?input=3+2
php artisan calc:run 3+2