fix: no screenshot taken on test failure (#600)

See #598

Author: norival

src/PantherTestCaseTrait.php

@@ -13,6 +13,7 @@
 
 namespace Symfony\Component\Panther;
 
+use PHPUnit\Runner\BaseTestRunner;
 use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
 use Symfony\Component\BrowserKit\HttpBrowser as HttpBrowserClient;
 use Symfony\Component\HttpClient\HttpClient;