tools(deps-dev): update vimeo/psalm requirement in /tools/psalm (#51)

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@4.17.0...4.18)

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

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tools/psalm/composer.json

@@ -4,7 +4,7 @@
     "type": "metapackage",
     "require-dev": {
         "roave/security-advisories": "dev-latest",
-        "vimeo/psalm": "4.17.0"
+        "vimeo/psalm": "4.18"
     },
     "prefer-stable": true,
     "config": {