Update README.md

Author: jgonfer

README.md

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 # Xcode UI Testing Cheat Sheet
 [![BuddyBuild](https://dashboard.buddybuild.com/api/statusImage?appID=577a31116ef5830100d98722&branch=master&build=latest)](https://dashboard.buddybuild.com/apps/577a31116ef5830100d98722/build/latest)
-[![platform](https://img.shields.io/badge/platform-ios|osx-lightgrey.svg?style=flat)](https://developer.apple.com/ios/)
+[![platform](https://img.shields.io/badge/platform-ios_|_osx-lightgrey.svg?style=flat)](https://developer.apple.com/ios/)
 [![env](https://img.shields.io/badge/env-xcode_7.3.1-lightgrey.svg?style=flat)](https://developer.apple.com/xcode/)
+[![swift](https://img.shields.io/badge/swift-2.2-orange.svg?style=flat)](https://swift.org/)
 [![Twitter: @j_gonfer](https://img.shields.io/badge/contact-@j__gonfer-yellow.svg?style=flat)](https://twitter.com/j_gonfer)
 
 Here you'll find some examples of UI Tests for Xcode 7, and [BDD](https://en.wikipedia.org/wiki/Behavior-driven_development) UI Tests with [Gherkin syntax](https://github.com/cucumber/cucumber/wiki/Gherkin) using the [XCTest-Gherkin framework](ps://github.com/net-a-porter-mobile/XCTest-Gherkin).