Update phpstan/phpstan-phpunit requirement from 0.12.17 to 0.12.22

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@0.12.17...0.12.22)

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

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

Author: dependabot[bot]

composer.json

@@ -40,7 +40,7 @@
         "matthiasnoback/symfony-dependency-injection-test": "^4.2",
         "phpspec/phpspec": "^7.0",
         "phpstan/phpstan": "0.12.99",
-        "phpstan/phpstan-phpunit": "0.12.17",
+        "phpstan/phpstan-phpunit": "0.12.22",
         "phpstan/phpstan-webmozart-assert": "0.12.16",
         "phpunit/phpunit": "^9.4",
         "sylius-labs/coding-standard": "^4.0",