Bump Symfony 8 to PHP >= 8.4

Author: nicolas-grekas

composer.json

@@ -24,15 +24,15 @@
         }
     ],
     "require": {
-        "php": ">=8.2",
+        "php": ">=8.4",
         "symfony/deprecation-contracts": "^2.5|^3"
     },
     "require-dev": {
-        "symfony/filesystem": "^6.4|^7.0|^8.0",
-        "symfony/var-exporter": "^6.4|^7.0|^8.0"
+        "symfony/filesystem": "^7.4|^8.0",
+        "symfony/var-exporter": "^7.4|^8.0"
     },
     "conflict": {
-        "symfony/string": "<7.1"
+        "symfony/string": "<7.4"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Intl\\": "" },