namespace problem

The command `php artisan selenium:make:test` create a class without a namespace.

so we can't run `vendor/bin/steward run staging chrome`

The output class should has a `Tests` namespace 

```php
<?php

namespace Tests;

use Modelizer\Selenium\SeleniumTestCase;

class SeleniumExampleTest extends SeleniumTestCase
{
    ...
}
```