Update rector/rector requirement from ^0.16 to ^0.18

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@0.16.0...0.18.0)

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

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

composer.json

@@ -30,7 +30,7 @@
         "ext-json": "*",
         "maglnet/composer-require-checker": "^4.2",
         "phpunit/phpunit": "^9.6|^10.0",
-        "rector/rector": "^0.16",
+        "rector/rector": "^0.18",
         "roave/infection-static-analysis-plugin": "^1.16",
         "spatie/phpunit-watcher": "^1.23",
         "vimeo/psalm": "^4.3|^5.6",