Updating README

We now support two versions.

Author: gbochenek

README.md

@@ -1,7 +1,9 @@
 [![NPM version](https://img.shields.io/npm/v/esri-wab-build.svg)](https://www.npmjs.com/package/esri-wab-build) [![NPM total download](https://img.shields.io/npm/dt/esri-wab-build.svg)](https://www.npmjs.com/package/esri-wab-build) [![dependencies](https://david-dm.org/gbochenek/esri-wab-build.svg)](https://david-dm.org/gbochenek/esri-wab-build) [![styled with prettier](https://img.shields.io/badge/styled_with-prettier-ff69b4.svg)](https://github.com/prettier/prettier)
 
 # esri-wab-build
-Package used to build ESRI Web App Builder (2.3) Apps for production.
+Package used to build ESRI Web App Builder Apps for production.
+
+Verified and designed for 2D Apps built using Web App Builder for Developers 2.3 or 2.4.
 
 This task runs a full dojo build on any web app builder application, which will greatly improve performance.