README.md in dry-behaviour-0.1.0 vs README.md in dry-behaviour-0.1.1

@@ -37,18 +37,12 @@
       def subtract(this, other)
         this
       end
     end
 
-    defimpl for: Integer do
-      def add(this, other)
-        this + other
-      end
-      def subtract(this, other)
-        this - other
-      end
-    end
+    # delegate `to_s` as is, map `add` and `subtract` to `:+` and `:-` respectively
+    defimpl target: Integer, delegate: :to_s, map: { add: :+, subtract: :- }
   end
 end
 ```
 
 ## Usage
@@ -65,9 +59,19 @@
 ```
 
 ## Authors
 
 @am-kantox, @saverio-kantox & @kantox
+
+## Changelog
+
+### `0.1.1` :: delegate and map methods to receiver
+
+`defimpl` now accepts `delegate` and `map`:
+
+```ruby
+defimpl MyProto, target: MyClass, delegate: :to_s, map: { add: :+, subtract: :- }
+```
 
 ## Installation
 
 Add this line to your application's Gemfile: