[6.4] Allow 7.0 deps

Author: nicolas-grekas

composer.json

@@ -18,11 +18,11 @@
     "require": {
         "php": ">=8.1",
         "psr/log": "^1|^2|^3",
-        "symfony/var-dumper": "^5.4|^6.0"
+        "symfony/var-dumper": "^5.4|^6.0|^7.0"
     },
     "require-dev": {
-        "symfony/http-kernel": "^5.4|^6.0",
-        "symfony/serializer": "^5.4|^6.0",
+        "symfony/http-kernel": "^5.4|^6.0|^7.0",
+        "symfony/serializer": "^5.4|^6.0|^7.0",
         "symfony/deprecation-contracts": "^2.5|^3"
     },
     "conflict": {