Update README file

Author: jgonfer

README.md

@@ -2,8 +2,8 @@
 ### Vector Images Tutorial for Xcode 9
 [![BuddyBuild](https://dashboard.buddybuild.com/api/statusImage?appID=59f9da49a53eea00010b40ea&branch=master&build=latest)](https://dashboard.buddybuild.com/apps/59f9da49a53eea00010b40ea/build/latest?branch=master)
 [![platform](https://img.shields.io/badge/platform-ios-lightgrey.svg?style=flat)](https://developer.apple.com/ios/)
-[![env](https://img.shields.io/badge/env-xcode_9.0.1-lightgrey.svg?style=flat)](https://developer.apple.com/xcode/)
-[![swift](https://img.shields.io/badge/swift-4.0-orange.svg?style=flat)](https://swift.org/)
+[![env](https://img.shields.io/badge/env-xcode_9.1-lightgrey.svg?style=flat)](https://developer.apple.com/xcode/)
+[![swift](https://img.shields.io/badge/swift-4.0.2-orange.svg?style=flat)](https://swift.org/)
 [![Web: jgonfer.com](https://img.shields.io/badge/web-jgonfer.com-yellow.svg?style=flat)](https://jgonfer.com)
 [![Twitter: @j_gonfer](https://img.shields.io/badge/twitter-@j__gonfer-blue.svg?style=flat)](https://twitter.com/j_gonfer)