Add composer platform config to prevent renovate installing incompatible versions

Author: matt

composer.json

@@ -15,6 +15,9 @@
         }
     ],
     "config": {
+        "platform": {
+            "php": "8.3.99"
+        },
         "sort-packages": true,
         "allow-plugins": {
             "dealerdirect/phpcodesniffer-composer-installer": true