Add support for symfony 7

Author: keulinho

composer.json

@@ -11,7 +11,7 @@
     ],
     "require": {
         "psr/container": "^1.0|^2.0",
-        "symfony/options-resolver": "^4.2 || ^5.0 || ^6.0"
+        "symfony/options-resolver": "^4.2 || ^5.0 || ^6.0 || ^7.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^8",