Bump Symfony 8 to PHP >= 8.4

Author: nicolas-grekas

composer.json

@@ -20,12 +20,12 @@
         }
     ],
     "require": {
-        "php": ">=8.2",
-        "symfony/http-client": "^6.4|^7.0|^8.0",
-        "symfony/notifier": "^7.2|^8.0"
+        "php": ">=8.4",
+        "symfony/http-client": "^7.4|^8.0",
+        "symfony/notifier": "^7.4|^8.0"
     },
     "require-dev": {
-        "symfony/event-dispatcher": "^6.4|^7.0|^8.0"
+        "symfony/event-dispatcher": "^7.4|^8.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Notifier\\Bridge\\Pushy\\": "" },