Update selective/test-traits requirement from ^3 to ^4

Updates the requirements on [selective/test-traits](https://github.com/selective-php/test-traits) to permit the latest version.
- [Release notes](https://github.com/selective-php/test-traits/releases)
- [Commits](selective-php/test-traits@3.0.0...4.0.0)

---
updated-dependencies:
- dependency-name: selective/test-traits
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -31,7 +31,7 @@
         "mikey179/vfsstream": "^1.6",
         "phpstan/phpstan": "1.*",
         "phpunit/phpunit": "^10",
-        "selective/test-traits": "^3",
+        "selective/test-traits": "^4",
         "squizlabs/php_codesniffer": "^3",
         "symfony/console": "^6",
         "symfony/dotenv": "^6",