Update rector/rector requirement from 1.2.0 to 1.2.1

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@1.2.0...1.2.1)

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

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

composer.json

@@ -48,7 +48,7 @@
         "phpunit/php-invoker": "^4.0||^5.0",
         "psalm/plugin-phpunit": "^0.19",
         "psalm/plugin-symfony": "^5.0",
-        "rector/rector": "1.2.0",
+        "rector/rector": "1.2.1",
         "symfony/expression-language": "^4.4||^5.0||^6.0||^7.0",
         "symfony/phpunit-bridge": "^6.4||^7.0",
         "vimeo/psalm": "^5.5.0"