Add missing changelog item.

README.md

@@ -201,6 +201,7 @@ Details:
 - master -
 - 0.8.1 - 
   - Improved documentation with a page comparing TypeCheck with Elixir's plain typespecs. (Thank you very much, @baldwindavid )
+  - Addition of missing override for the type `Range.t/0`. (Thank you very much, @baldwindavid )
 - 0.8.0 -
   - Fixes prettyprinting of `TypeCheck.Builtin.Range`.
   - Addition of `require TypeCheck.Type` to `use TypeCheck` so there no longer is a need to call this manually if you want to e.g. use `TypeCheck.Type.build/1`.