Add support for Symfony 8 (#24)

Author: Pixelshaped

composer.json

@@ -23,9 +23,9 @@
     "require": {
         "php": "^8.2",
         "symfony/cache-contracts": "^2.5 || ^3.3",
-        "symfony/config": "^5.4 || ^6.0 || ^7.0",
-        "symfony/dependency-injection": "^5.4 || ^6.0 || ^7.0",
-        "symfony/http-kernel": "^5.4 || ^6.0 || ^7.0"
+        "symfony/config": "^5.4 || ^6.0 || ^7.0 || ^8.0",
+        "symfony/dependency-injection": "^5.4 || ^6.0 || ^7.0 || ^8.0",
+        "symfony/http-kernel": "^5.4 || ^6.0 || ^7.0 || ^8.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^11.1",