composer(deps-dev): Bump vimeo/psalm from 5.20.0 to 5.21.0

Bumps [vimeo/psalm](https://github.com/vimeo/psalm) from 5.20.0 to 5.21.0.
- [Release notes](https://github.com/vimeo/psalm/releases)
- [Commits](vimeo/psalm@5.20.0...5.21.0)

---
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

@@ -56,7 +56,7 @@
     "psalm/plugin-symfony": "^5.1.0",
     "rector/rector": "~0.19.5",
     "symplify/config-transformer": "^12.3.4",
-    "vimeo/psalm": "^5.20.0"
+    "vimeo/psalm": "^5.21.0"
   },
   "replace": {
     "paragonie/random_compat": "*",