Update dependency phpunit/phpunit to v13 (#64)

| datasource | package         | from    | to     |
| ---------- | --------------- | ------- | ------ |
| packagist  | phpunit/phpunit | 12.5.11 | 13.0.2 |

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

composer.json

@@ -17,7 +17,7 @@
         "phpstan/phpstan": "^2.1.39",
         "phpstan/phpstan-phpunit": "^2.0.15",
         "phpstan/phpstan-strict-rules": "^2.0.10",
-        "phpunit/phpunit": "^12.5.11",
+        "phpunit/phpunit": "^13.0.2",
         "slam/php-cs-fixer-extensions": "^3.14.0",
         "symfony/console": "^8.0.4"
     },