composer(deps-dev): bump vimeo/psalm from 4.19.0 to 4.20.0

Bumps [vimeo/psalm](https://github.com/vimeo/psalm) from 4.19.0 to 4.20.0.
- [Release notes](https://github.com/vimeo/psalm/releases)
- [Commits](vimeo/psalm@4.19.0...4.20.0)

---
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

@@ -26,7 +26,7 @@
     "phpunit/phpunit": "^9.5.13",
     "psalm/plugin-phpunit": "~0.16.1",
     "symfony/filesystem": "^4.4.0 || ^5.0.0",
-    "vimeo/psalm": "^4.19"
+    "vimeo/psalm": "^4.20"
   },
   "autoload": {
     "psr-4": {