Update dependency phpunit/phpunit to v12

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| packagist  | phpunit/phpunit | 11.5.7 | 12.0.2 |


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

Author: renovate[bot]

composer.json

@@ -16,7 +16,7 @@
     "require-dev": {
         "interaction-design-foundation/coding-standard": "^0.3.0",
         "orchestra/testbench-core": "^8.22 || ^v9.7",
-        "phpunit/phpunit": "^10.5 || ^11.0",
+        "phpunit/phpunit": "^12.0",
         "vimeo/psalm": "^6.0"
     },
     "repositories": [