Update dependency phpunit/phpunit to v11

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| packagist  | phpunit/phpunit | 9.6.15 | 11.0.0 |


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

composer.json

@@ -46,7 +46,7 @@
         "http-interop/http-factory-tests": "^0.9.0",
         "laminas/laminas-coding-standard": "~2.5.0",
         "php-http/psr7-integration-tests": "^1.3",
-        "phpunit/phpunit": "^9.5.28",
+        "phpunit/phpunit": "^11.0.0",
         "psalm/plugin-phpunit": "^0.18.4",
         "vimeo/psalm": "^5.17"
     },