Drop Symfony 6

Author: andrewmy

composer.json

@@ -17,10 +17,10 @@
         "phpunit/phpunit": "^9.5",
         "enqueue/test": "0.10.x-dev",
         "doctrine/doctrine-bundle": "^2.5|^3.1",
-        "symfony/browser-kit": "^6.2|^7.0|^8.0",
-        "symfony/expression-language": "^6.2|^7.0|^8.0",
-        "symfony/framework-bundle": "^6.2|^7.0|^8.0",
-        "symfony/yaml": "^6.2|^7.0|^8.0"
+        "symfony/browser-kit": "^7.0|^8.0",
+        "symfony/expression-language": "^7.0|^8.0",
+        "symfony/framework-bundle": "^7.0|^8.0",
+        "symfony/yaml": "^7.0|^8.0"
     },
     "support": {
         "email": "[email protected]",