chore(deps-dev): update rector/rector requirement

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@0.12.15...0.12.16)

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

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

Author: dependabot[bot]

composer.json

@@ -24,7 +24,7 @@
         "phpstan/phpstan": "^1.0",
         "phpunit/phpunit": "^9.1",
         "predis/predis": "^1.1",
-        "rector/rector": "0.12.15"
+        "rector/rector": "0.12.16"
     },
     "suggest": {
         "ext-fileinfo": "Improves mime type detection for files"