Update composer.json to use Larastan Org (#203)

Author: arnebr

composer.json

@@ -23,7 +23,7 @@
         "spatie/laravel-package-tools": "^1.11"
     },
     "require-dev": {
-        "nunomaduro/larastan": "^1.0.4|^2.2",
+        "larastan/larastan": "^1.0.4|^2.2",
         "orchestra/testbench": "^7.0|^8.0",
         "phpstan/extension-installer": "^1.0",
         "phpstan/phpstan-deprecation-rules": "^1.0",