chore(deps): update dependency symfony/var-exporter to v7 (#1490)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Benedikt Franke <[email protected]>

Author: renovate[bot]

composer.json

@@ -32,7 +32,7 @@
     "react/promise": "^2.9",
     "rector/rector": "^0.18",
     "symfony/polyfill-php81": "^1.23",
-    "symfony/var-exporter": "^5 || ^6",
+    "symfony/var-exporter": "^5 || ^6 || ^7",
     "thecodingmachine/safe": "^1.3 || ^2"
   },
   "suggest": {