build(deps-dev): update phpstan/phpstan-phpunit requirement

Updates the requirements on [phpstan/phpstan-phpunit](https://github.com/phpstan/phpstan-phpunit) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan-phpunit/releases)
- [Commits](phpstan/phpstan-phpunit@0.12.16...0.12.17)

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

Author: dependabot-preview[bot]

composer.json

@@ -23,7 +23,7 @@
         "infection/infection": "^0.20.2",
         "phpstan/extension-installer": "^1.0",
         "phpstan/phpstan": "^0.12.68",
-        "phpstan/phpstan-phpunit": "^0.12.16",
+        "phpstan/phpstan-phpunit": "^0.12.17",
         "phpunit/phpunit": "^9.5",
         "spatie/phpunit-snapshot-assertions": "^4.2",
         "symfony/var-dumper": "^5.1",