Update composer.json

Author: Nyholm

composer.json

@@ -39,10 +39,10 @@
         "sort-packages": true
     },
     "require-dev": {
-        "symfony/phpunit-bridge": "^4.3.7|^5.0",
-        "symfony/stopwatch": "^4.3.7|^5.0",
+        "symfony/phpunit-bridge": "^4.3.7|^5.0|^6.0",
+        "symfony/stopwatch": "^4.3.7|^5.0|^6.0",
         "symfony/ux-turbo-mercure": "*",
-        "symfony/var-dumper": "^4.3.7|^5.0"
+        "symfony/var-dumper": "^4.3.7|^5.0|^6.0"
     },
     "suggest": {
         "symfony/messenger": "To use the Messenger integration"