Update dependency friendsofphp/php-cs-fixer to v3.12.0

Author: renovate[bot]

composer.json

@@ -24,7 +24,7 @@
         "psr/http-factory": "^1.0"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "3.11.0",
+        "friendsofphp/php-cs-fixer": "3.12.0",
         "phpunit/phpunit": "9.5.10",
         "guzzlehttp/psr7": "2.1.0",
         "php-mock/php-mock-phpunit": "2.6.0"