Update rector/rector requirement from ^0.17 to ^0.18 (#169)

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@0.17.0...0.18.0)

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

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composer.json

@@ -26,7 +26,7 @@
         "ilario-pierbattista/reverse-regex": "^0.3.1",
         "phpstan/phpstan": "^1.10",
         "psalm/phar": "^5.4",
-        "rector/rector": "^0.17"
+        "rector/rector": "^0.18"
     },
     "suggest":
     {