chore: port phpstan config to v2

Author: alfonsobries

phpstan.neon

@@ -16,4 +16,6 @@ parameters:
         - '#Dynamic call to static method Illuminate\\Database\\Eloquent\\((Builder|Relations|Model)+[\w\\\:\(\)\<\>]+).#'
         - '#Method ([\w\\]+(Livewire|Components)+[\w\\\:\(\)\<\>]+\:\:rules\(\)) is protected, but since the containing class is final, it can be private.#'
         - '#Access to an undefined property Spatie\\Activitylog\\Models\\Activity.#'
+        - identifier: missingType.iterableValue
+        - identifier: missingType.generics
     reportUnmatchedIgnoredErrors: false