Update dependency phpunit/phpunit to v12

| datasource | package         | from    | to      |
| ---------- | --------------- | ------- | ------- |
| packagist  | phpunit/phpunit | 11.5.41 | 12.3.15 |

Author: renovate[bot]

composer.json

@@ -25,7 +25,7 @@
     "require-dev": {
         "azjezz/psl": "^3.3.0",
         "doctrine/coding-standard": "^13.0.1",
-        "phpunit/phpunit": "^11.5.34",
+        "phpunit/phpunit": "^12.3.15",
         "psalm/plugin-phpunit": "^0.19.5"
     },
     "autoload": {