README.md in mutils-1.1.8 vs README.md in mutils-1.2.0

@@ -72,9 +72,11 @@
 # User Serializer
 class UserSerializer < Mutils::Serialization::BaseSerializer
   attributes :id, :first_name, :last_name, :email
   ## OR
   attribute :email, {always_include: true} ## this will allow to selectively include email
+  ## OR
+  attribute :email, &:email ## this will call email attribute from User
 end
 ```
 ### Relations
 Relations such as `has_many`, `belongs_to`, `has_one` can be used as follows
 1. Every relation must be provided with their own serializer