Bump vimeo/psalm from 4.14.0 to 4.15.0

Bumps [vimeo/psalm](https://github.com/vimeo/psalm) from 4.14.0 to 4.15.0.
- [Release notes](https://github.com/vimeo/psalm/releases)
- [Commits](vimeo/psalm@v4.14.0...v4.15.0)

---
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

@@ -25,7 +25,7 @@
     "require-dev": {
         "mockery/mockery": "^1.4.3",
         "phpunit/phpunit": "^9.5",
-        "vimeo/psalm": "^4.14"
+        "vimeo/psalm": "^4.15"
     },
     "suggest": {
         "ext-pcntl": "The command needs pcntl to listen to SIGINT/SIGTERM signals."