[TASK] Update eliashaeussler/rector-config to v4

| datasource | package                      | from  | to    |
| ---------- | ---------------------------- | ----- | ----- |
| packagist  | eliashaeussler/rector-config | 3.2.0 | 4.0.0 |

Author: renovate[bot]

composer.json

@@ -38,7 +38,7 @@
 		"eliashaeussler/deep-closure-comparator": "^1.2.1",
 		"eliashaeussler/php-cs-fixer-config": "^3.0",
 		"eliashaeussler/phpstan-config": "^3.1.1",
-		"eliashaeussler/rector-config": "^3.0",
+		"eliashaeussler/rector-config": "^4.0",
 		"eliashaeussler/transient-logger": "^2.0",
 		"eliashaeussler/version-bumper": "^3.0",
 		"ergebnis/composer-normalize": "^2.28",