Do not longer test unsupported versions of Symfony

Author: ondrejmirtes

Diff for: composer.json

@@ -27,15 +27,15 @@
     "phpstan/phpstan-strict-rules": "^1.0",
     "phpunit/phpunit": "^9.5",
     "psr/container": "1.0 || 1.1.1",
-    "symfony/config": "^4.2 || ^5.0",
-    "symfony/console": "^4.0 || ^5.0",
-    "symfony/dependency-injection": "^4.0 || ^5.0",
-    "symfony/form": "^4.0 || ^5.0",
-    "symfony/framework-bundle": "^4.4 || ^5.0",
-    "symfony/http-foundation": "^5.1",
-    "symfony/messenger": "^4.2 || ^5.0",
+    "symfony/config": "^5.4",
+    "symfony/console": "^5.4",
+    "symfony/dependency-injection": "^5.4",
+    "symfony/form": "^5.4",
+    "symfony/framework-bundle": "^5.4",
+    "symfony/http-foundation": "^5.4",
+    "symfony/messenger": "^5.4",
     "symfony/polyfill-php80": "^1.24",
-    "symfony/serializer": "^4.0 || ^5.0"
+    "symfony/serializer": "^5.4"
   },
   "config": {
     "platform": {