Updating Readme

Author: cdibbs

README.md

@@ -1,7 +1,7 @@
 [![Build Status](https://travis-ci.org/cdibbs/simple-mapper.svg?branch=master)](https://travis-ci.org/cdibbs/simple-mapper)
 
 # SimpleMapper
-Angular 2+ SimpleMapper provides object-to-object mapping. It can be used to map objects of any type,
+Angular 4+ SimpleMapper provides object-to-object mapping. It can be used to map objects of any type,
 though the original intention was to provide a way to recursively map simple JSON objects into nested
 view models (thereby gaining the benefit of any view model methods, etc).