Allow Symfony 6

Author: stephanvierkant

composer.json

@@ -18,7 +18,7 @@
         "ext-mbstring": "*",
         "guzzlehttp/guzzle": "^7.0 || ^6.0",
         "psr/cache": "^1.0 || ^2.0",
-        "symfony/event-dispatcher": "^5.0 || ^4.0 || ^3.0",
+        "symfony/event-dispatcher": "^6.0 || ^5.0 || ^4.0 || ^3.0",
         "psr/log": "^1.0 || ^2.0 || ^3.0",
         "guzzlehttp/promises": "^1.3",
         "spatie/dns": "^1.4"