Update docs.

README.md

@@ -7,7 +7,7 @@ Cast request input in Laravel.
 ## Basic Usage
 1. Add `NickEscobedo\Cambia\CastRequestAttributes` trait to your request class.
 1. Add a `casts` function to your request class that returns an array.
-1. Access casts via request attributes `$request->attributes->get('inputKey')`. Note: The request key must have be validated in rules before it will attempt to cast.
+1. Access casts via request attributes `$request->castedInput('inputKey')`. Note: The request key must have be validated in rules before it will attempt to cast.
 
 ## Example
 ```php
@@ -37,17 +37,17 @@ class Cast extends FormRequest
 - integer
 - float
 - double
-- decimal
+- decimal:int
 - string
 - boolean
 - object
 - array
 - json
 - collection
 - date
-- datetime
+- datetime or datetime:format
 - immutable_date
-- immutable_datetime
+- immutable_datetime or immutable_datetime:format
 - timestamp