Update Readme.md

Author: hailwood

Readme.md

@@ -73,6 +73,8 @@ The following order of precedence is used for calculating values for a form
 0. Attributes from the model provided to `@form`
 0. Values passed in directly e.g. `@formField(['name' => 'name', 'value' => 'John'])`.
 
+Additionally if the final calculated value is an object and has a `getValue` method, this will be called.
+
 ### Note on _old_ input and multiple forms...
 Unfortunately, there's no way to scope Laravels `old($fieldName)` helper, meaning that if one form on a page has old input, 
 all fields on the page with the same name will be populated with the old input. 
@@ -93,4 +95,4 @@ If you don't have them already, add the following to your projects `.idea/blade.
 <data directive="@endform" />
 <data directive="@form" injection="true" prefix="&lt;?php function x(array $options) {}; x(" suffix="); ?&gt;" />
 <data directive="@formField" injection="true" prefix="&lt;?php function x(array $options) {}; x(" suffix="); ?&gt;" />
-```
+```