build(deps-dev): update rector/rector requirement

Updates the requirements on [rector/rector](https://github.com/rectorphp/rector) to permit the latest version.
- [Release notes](https://github.com/rectorphp/rector/releases)
- [Commits](rectorphp/rector@0.17.0...0.18.6)

---
updated-dependencies:
- dependency-name: rector/rector
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -30,7 +30,7 @@
         "pestphp/pest-plugin-arch": "^2.1.2",
         "pestphp/pest-plugin-mock": "^2.0.0",
         "phpstan/phpstan": "^1.10.15",
-        "rector/rector": "^0.17.0",
+        "rector/rector": "^0.18.6",
         "symfony/var-dumper": "^6.2.10"
     },
     "autoload": {