No support for Laravel 5.8

[AfikDeri]

I see in your composer.json that you specify that this package requires illuminate/support 5.5.* || 5.6.* || 5.7.* .

Is there a reason not to add 5.8.* as well?

Some issues you may encounter if you upgrade:

1. You probably want to require orchestra/testbench 3.8.* as well
2. php test will most likely fail unless you change the setUp method signature in TestCase.php to public function setUp(): void