Add React version

Author: bradymholt

README.md

@@ -12,7 +12,7 @@ This app is a template application using ASP.NET Core 2.0 for a REST/JSON API se
   - JSON Web Token (JWT) authorization
   - Docker used for development PostgreSQL database and MailCatcher server
 - Client
-  - React
+  - React 15.6
   - Webpack for asset bundling and HMR (Hot Module Replacement)
   - CSS Modules
   - Fetch API for REST requests