Update phpunit/phpunit requirement from ~7.5 | ~9.5 to ^11.2.9

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -12,7 +12,7 @@
 		"php": ">=7.1"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "~7.5 | ~9.5",
+		"phpunit/phpunit": "^11.2.9",
 		"squizlabs/php_codesniffer": "^3.7",
 		"corpus/coding-standard": "^0.6.0",
 		"friendsofphp/php-cs-fixer": "^2.19"