Allow Symfony 8 in version constraints

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: maltehuebner

composer.json

@@ -4,8 +4,8 @@
     "require": {
         "php": "^8.3",
         "ruflin/elastica": "^7.0",
-        "symfony/framework-bundle": "^4.0|^5.0|^6.0|^7.0",
-        "symfony/validator": "^4.0|^5.0|^6.0|^7.0"
+        "symfony/framework-bundle": "^4.0|^5.0|^6.0|^7.0|^8.0",
+        "symfony/validator": "^4.0|^5.0|^6.0|^7.0|^8.0"
 
     },
     "suggest": {