Update dependency phpunit/phpunit to ^9.6.33 [SECURITY]

| datasource | package         | from  | to     |
| ---------- | --------------- | ----- | ------ |
| packagist  | phpunit/phpunit | 9.5.6 | 9.6.33 |

Author: renovate[bot]

composer.json

@@ -31,7 +31,7 @@
         "ext-phar":                               "*",
         "doctrine/coding-standard":               "^9.0.0",
         "phpbench/phpbench":                      "^1.0.3",
-        "phpunit/phpunit":                        "^9.5.6",
+        "phpunit/phpunit":                        "^9.6.33",
         "roave/infection-static-analysis-plugin": "^1.8",
         "squizlabs/php_codesniffer":              "^3.6.0",
         "vimeo/psalm":                            "^4.8.1"