Add dumper to dev dependencies.

Author: adrorocker

composer.json

@@ -16,7 +16,8 @@
         "pestphp/pest": "^2.9",
         "phpstan/phpstan": "^1.10",
         "phpunit/phpunit": "^10.2",
-        "squizlabs/php_codesniffer": "^3.7"
+        "squizlabs/php_codesniffer": "^3.7",
+        "symfony/var-dumper": "^6.3"
     },
     "autoload": {
         "psr-4": {