Update dependency phpunit/phpunit to v12

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| packagist  | phpunit/phpunit | 11.5.7 | 12.0.3 |

Author: renovate[bot]

composer.json

@@ -22,7 +22,7 @@
     "require-dev": {
         "azjezz/psl": "^3.2",
         "doctrine/coding-standard": "^12.0.0",
-        "phpunit/phpunit": "^11.5.7",
+        "phpunit/phpunit": "^12.0.3",
         "psalm/plugin-phpunit": "^0.19.2"
     },
     "autoload": {