Update rector/rector requirement from ^0.16.0 || ^0.17.0 || ^0.18.0 t…

…o ^0.16.0 || ^0.17.0 || ^0.18.0 || ^0.19.0

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](https://github.com/rectorphp/rector/commits/0.19.0)

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

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

composer.json

@@ -36,7 +36,7 @@
     "php-parallel-lint/php-parallel-lint": "^1.3",
     "phpspec/prophecy": "^1.17",
     "phpspec/prophecy-phpunit": "^2.0",
-    "rector/rector": "^0.16.0 || ^0.17.0 || ^0.18.0"
+    "rector/rector": "^0.16.0 || ^0.17.0 || ^0.18.0 || ^0.19.0"
   },
   "suggest": {
     "illuminate/container": "Hold dependencies to be injected in commands constructors",