Update composer.json

Author: freekmurze

composer.json

@@ -22,7 +22,7 @@
     "require-dev": {
         "pestphp/pest": "^3.7.1",
         "spatie/test-time": "^1.3.3|^2.0",
-        "symfony/var-dumper": "^4.3|^5.4.48"
+        "symfony/var-dumper": "^4.3|^5.4.48|^6.0|^7.0"
     },
     "autoload": {
         "psr-4": {