update symfony/phpunit-bridge dependency

Author: wachterjohannes

composer.json

@@ -32,7 +32,7 @@
         "symfony/security-bundle": "^4.3 || ^5.0",
         "symfony/twig-bundle": "^4.3 || ^5.0",
         "symfony/validator": "^4.3 || ^5.0",
-        "symfony/phpunit-bridge": "^5.0.4",
+        "symfony/phpunit-bridge": "^5.0.4 || ^6.4",
         "matthiasnoback/symfony-dependency-injection-test": "^4.0",
         "doctrine/doctrine-bundle": "^1.10 || ^2.0",
         "doctrine/orm": "^2.5",