Allow Symfony 6

Author: derrabus

composer.json

@@ -21,8 +21,8 @@
     ],
     "require": {
         "php": ">=7.2.5",
-        "symfony/http-client": "^4.3|^5.0",
-        "symfony/notifier": "^5.3"
+        "symfony/http-client": "^4.3|^5.0|^6.0",
+        "symfony/notifier": "^5.3|^6.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Notifier\\Bridge\\GatewayApi\\": "" },