Bump vimeo/psalm from 4.8.1 to 4.21.0

Bumps [vimeo/psalm](https://github.com/vimeo/psalm) from 4.8.1 to 4.21.0.
- [Release notes](https://github.com/vimeo/psalm/releases)
- [Commits](vimeo/psalm@4.8.1...4.21.0)

---
updated-dependencies:
- dependency-name: vimeo/psalm
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

composer.json

@@ -27,7 +27,7 @@
         "infection/infection": "^0.20 || ^0.21",
         "phpstan/phpstan": "^0.12.93",
         "phpunit/phpunit": "^9.5",
-        "vimeo/psalm": "^4.3"
+        "vimeo/psalm": "^4.21"
     },
     "config": {
         "sort-packages": true