Composer(deps-dev): Update rector/rector requirement from ^1.2 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@1.2.0...2.2.14)

---
updated-dependencies:
- dependency-name: rector/rector
  dependency-version: 2.2.14
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -23,7 +23,7 @@
 		"php-parallel-lint/php-parallel-lint": "^1.0",
 		"phpcompatibility/phpcompatibility-wp": "^2.1",
 		"phpunit/phpunit": "^9",
-		"rector/rector": "^1.2",
+		"rector/rector": "^2.2",
 		"yoast/wp-test-utils": "^1.2"
 	},
 	"config": {