Update vimeo/psalm requirement from ^5.17 to ^5.18 (#94)

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@5.17.0...5.18.0)

---
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>

composer.json

@@ -19,7 +19,7 @@
     "doctrine/coding-standard": "^12.0",
     "phpunit/phpunit": "^10.5.3",
     "psalm/plugin-phpunit": "^0.18.4",
-    "vimeo/psalm": "^5.17"
+    "vimeo/psalm": "^5.18"
   },
   "autoload": {
     "psr-4": {