Update README.md

Author: ras0219-msft

README.md

@@ -39,8 +39,8 @@ target_link_libraries(main PRIVATE cpprestsdk::cpprest)
 
 *   Features - HTTP client/server, JSON, URI, asynchronous streams, WebSockets client, oAuth
 *   PPL Tasks - A powerful model for composing asynchronous operations based on C++ 11 features
-*   Platforms - Windows desktop, Windows Store, Windows Phone, Ubuntu, OS X, iOS, and Android
-*   Support for Visual Studio 2012, 2013, and 2015 with debugger visualizers
+*   Platforms - Windows desktop, Windows Store (UWP), Linux, OS X, Unix, iOS, and Android
+*   Support for Visual Studio 2015 and 2017 with debugger visualizers
 
 ## Contribute Back!