fix composer.json to move phpstan to dev section

Author: NONstop5

composer.json

@@ -29,16 +29,16 @@
   "require": {
     "illuminate/collections": "^12.0",
     "nesbot/carbon": "^3.9",
-    "symfony/string": "^7.2",
-    "phpstan/phpstan": "^2.1"
+    "symfony/string": "^7.2"
   },
   "require-dev": {
     "psy/psysh": "@stable",
     "phpstan/phpstan-phpunit": "^2.0",
     "phpstan/extension-installer": "^1.3",
     "symfony/var-dumper": "^7.2",
     "phpunit/phpunit": "^11.5",
-    "squizlabs/php_codesniffer": "*"
+    "squizlabs/php_codesniffer": "*",
+    "phpstan/phpstan": "^2.1"
   },
   "config": {
     "allow-plugins": {