Drop Symfony v6.0 support (#27)

Author: PabloKowalczyk

composer.json

@@ -24,9 +24,9 @@
     },
     "require": {
         "php": ">=7.4",
-        "symfony/config": "^5.4 || ^6.0",
-        "symfony/dependency-injection": "^5.4 || ^6.0",
-        "symfony/http-kernel": "^5.4 || ^6.0"
+        "symfony/config": "^5.4 || ^6.1",
+        "symfony/dependency-injection": "^5.4 || ^6.1",
+        "symfony/http-kernel": "^5.4 || ^6.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.4"