build(deps-dev): update psalm/plugin-phpunit requirement (#46)

Updates the requirements on [psalm/plugin-phpunit](https://github.com/psalm/psalm-plugin-phpunit) to permit the latest version.
- [Release notes](https://github.com/psalm/psalm-plugin-phpunit/releases)
- [Commits](psalm/psalm-plugin-phpunit@0.18.4...0.19.0)

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

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

Author: dependabot[bot]

composer.json

@@ -52,7 +52,7 @@
         "phpstan/phpstan-deprecation-rules": "^1.1",
         "phpstan/phpstan-phpunit": "^1.3",
         "phpunit/phpunit": "^10.5",
-        "psalm/plugin-phpunit": "^0.18.4",
+        "psalm/plugin-phpunit": "^0.19.0",
         "symfony/framework-bundle": "^6.4 || ^7.0",
         "symfony/http-kernel": "^6.4 || ^7.0",
         "symfony/runtime": "^6.4 || ^7.0",