Update to Statamic 5 test suite

Author: ryanmitchell

.gitignore

@@ -3,4 +3,5 @@ vendor
 mix-manifest.json
 public/hot
 composer.lock
-.idea
+.idea
+.phpunit.cache

tests/TestCase.php

@@ -2,15 +2,10 @@
 
 namespace Tests;
 
+use Statamic\Testing\AddonTestCase;
 use Tv2regionerne\StatamicFilterBuilder\ServiceProvider;
 
-class TestCase extends \Orchestra\Testbench\TestCase
+class TestCase extends AddonTestCase
 {
-    protected function getPackageProviders($app)
-    {
-        return [
-            ServiceProvider::class,
-            \Statamic\Providers\StatamicServiceProvider::class,
-        ];
-    }
+    protected string $addonServiceProvider = ServiceProvider::class;
 }