Update vimeo/psalm requirement from ^4.23.0 to ^4.29.0 (#24)

Updates the requirements on [vimeo/psalm](https://github.com/vimeo/psalm) to permit the latest version.
- [Release notes](https://github.com/vimeo/psalm/releases)
- [Commits](vimeo/psalm@4.23.0...4.29.0)

---
updated-dependencies:
- dependency-name: vimeo/psalm
  dependency-type: direct:development
...

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composer.json

@@ -25,7 +25,7 @@
   "require-dev": {
     "doctrine/coding-standard": "^9.0.0",
     "phpunit/phpunit": "^9.5.20",
-    "vimeo/psalm": "^4.23.0",
+    "vimeo/psalm": "^4.29.0",
     "infection/infection": "^0.26.10"
   },
   "config": {