update CHANGELOG

CHANGELOG.md

@@ -1,7 +1,9 @@
 ## 2.1.0.dev
 
 ### enhancements
-
+  * Allow to specify custom wrappers for input types.
+  ([@nashby](https://github.com/nashby))
+  Closes [#636](https://github.com/plataformatec/simple_form/issues/636)
   * Use separate config file to do bootstrap specific configuration.
   ([@nashby](https://github.com/nashby))
 

lib/simple_form.rb

@@ -96,7 +96,7 @@ module SimpleForm
   @@input_mappings = nil
 
   # Custom wrappers for input types. This should be a hash containing an input
-  # type as key and the wrapper that will be used for all inputs with specified type
+  # type as key and the wrapper that will be used for all inputs with specified type.
   # e.g { :string => :string_wrapper, :boolean => :boolean_wrapper }
   mattr_accessor :wrapper_mappings
   @@wrapper_mappings = nil