✨ Support prepareForValidation method

See #23

src/Action.php

@@ -61,14 +61,20 @@ public function runAs(Action $action)
     public function run(array $attributes = [])
     {
         $this->fill($attributes);
+        $this->prepareForValidation();
         $this->resolveBeforeHook();
         $this->resolveAuthorization();
         $this->resolveValidation();
 
         return $this->resolveAndCall($this, 'handle');
     }
 
-    public function resolveBeforeHook()
+    protected function prepareForValidation()
+    {
+        //
+    }
+
+    protected function resolveBeforeHook()
     {
         $method = 'as' . Str::studly($this->runningAs);