Update rector/rector requirement from ~2.0.0 to ~2.1.0 (#321)

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@2.0.0...2.1.0)

---
updated-dependencies:
- dependency-name: rector/rector
  dependency-version: 2.1.0
  dependency-type: direct:production
...

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Author: dependabot[bot]

composer.json

@@ -8,7 +8,7 @@
         "php": "^8.1",
         "cakephp/console": "^5.0",
         "nette/utils": "^4.0",
-        "rector/rector": "~2.0.0",
+        "rector/rector": "~2.1.0",
         "symfony/string": "^6.0 || ^7.0"
     },
     "autoload": {