feat: allow symfony ^6.4

Author: Fahl-Design

composer.json

@@ -29,7 +29,7 @@
     "psr/http-message": "^2.0",
     "psr/http-server-handler": "^1.0",
     "psr/http-server-middleware": "^1.0",
-    "symfony/cache": "^7.4",
+    "symfony/cache": "^6.4 || ^7.4 || ^8.0",
     "webmozart/assert": "^1.12"
   },
   "require-dev": {