Pin PHP-CS-Fixer to 3.16.0

There is a problem with PHP-CS-Fixer 3.17.0

@cleptric suggested pinning it.

Author: ruudk

composer.json

@@ -65,6 +65,9 @@
         "symfony/yaml": "^4.4.20||^5.0.11||^6.0",
         "vimeo/psalm": "^4.3"
     },
+    "conflict": {
+        "friendsofphp/php-cs-fixer": ">=3.17.0"
+    },
     "suggest": {
         "monolog/monolog": "Allow sending log messages to Sentry by using the included Monolog handler.",
         "doctrine/doctrine-bundle": "Allow distributed tracing of database queries using Sentry.",