Update Symfony package versions to include 8.0 (#185)

Author: thecaliskan

composer.json

@@ -13,10 +13,10 @@
         "php": ">=8.0.5",
         "psr/http-server-handler": "^1.0",
         "react/http": "^1.6",
-        "symfony/runtime": "^5.4 || ^6.0 || ^7.0"
+        "symfony/runtime": "^5.4 || ^6.0 || ^7.0 || ^8.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.5"
+        "phpunit/phpunit": "^10.5.58"
     },
     "minimum-stability": "dev",
     "prefer-stable": true,