composer: update rector/rector requirement from ^2.1 to ^2.2

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@2.1.0...2.2.0)

---
updated-dependencies:
- dependency-name: rector/rector
  dependency-version: 2.2.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -40,7 +40,7 @@
         "friendsofphp/php-cs-fixer": "^3.87",
         "ergebnis/composer-normalize": "^2.48",
         "ergebnis/php-cs-fixer-config": "^6.54",
-        "rector/rector": "^2.1"
+        "rector/rector": "^2.2"
     },
     "type": "library",
     "homepage": "http://v.s.cz/ease.php",