Update symfony/var-dumper requirement from ^6.4 to ^7.1

Updates the requirements on [symfony/var-dumper](https://github.com/symfony/var-dumper) to permit the latest version.
- [Release notes](https://github.com/symfony/var-dumper/releases)
- [Changelog](https://github.com/symfony/var-dumper/blob/7.1/CHANGELOG.md)
- [Commits](symfony/var-dumper@v6.4.0...v7.1.2)

---
updated-dependencies:
- dependency-name: symfony/var-dumper
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

composer.json

@@ -33,7 +33,7 @@
         "rector/rector": "^1.0",
         "spatie/invade": "^2.0",
         "spatie/ray": "^1.40.1",
-        "symfony/var-dumper": "^6.4"
+        "symfony/var-dumper": "^7.1"
     },
     "autoload": {
         "psr-4": {