Update README, version bump to 2.2.0.

README.md

@@ -11,7 +11,7 @@ along with `:ex_aws` and your preferred JSON codec / http client
 def deps do
   [
     {:ex_aws, "~> 2.0"},
-    {:ex_aws_dynamo, "~> 2.1"},
+    {:ex_aws_dynamo, "~> 2.2"},
     {:poison, "~> 3.0"},
     {:hackney, "~> 1.9"},
   ]
@@ -20,6 +20,19 @@ end
 
 Documentation can be found at [https://hexdocs.pm/ex_aws_dynamo](https://hexdocs.pm/ex_aws_dynamo).
 
+## Configuration
+
+### `decode_sets`
+
+The default behavior of this application is to encode Elixir `MapSet` data to one of DynamoDB's three set types - number set, string set, or binary set; however, those DynamoDB datatypes will be decoded to Elixir `List`. If you wish to decode DynamoDB set types to Elixir `MapSet`, you can set the configuration for this application to include `decode_sets: true`.
+
+For example:
+
+```
+config :ex_aws, :dynamodb,
+  decode_sets: true
+```
+
 ## License
 
 The MIT License (MIT)

mix.exs

@@ -1,7 +1,7 @@
 defmodule ExAws.Dynamo.Mixfile do
   use Mix.Project
 
-  @version "2.1.0"
+  @version "2.2.0"
   @service "dynamo"
   @url "https://github.com/ex-aws/ex_aws_#{@service}"
   @name __MODULE__ |> Module.split() |> Enum.take(2) |> Enum.join(".")