fix readme (#5)

Author: bwoskow-ld

README.md

@@ -1,7 +1,6 @@
 # LDSwiftEventSource
-** Server-Sent Events for iOS, watchOS, tvOS and macOS
-
-[![LaunchDarkly](https://circleci.com/gh/launchdarkly/swift-eventsource.svg?style=shield)](https://circleci.com/gh/launchdarkly/swift-eventsource)
+**Server-Sent Events for iOS, watchOS, tvOS and macOS**
 
+[![CircleCI](https://circleci.com/gh/launchdarkly/swift-eventsource.svg?style=svg&circle-token=0da2511947a69c1f3f88dd46e934e2d889bd1e36)](https://circleci.com/gh/launchdarkly/swift-eventsource)
 
 Swift EventSource implementation originally written to replace a [LaunchDarkly fork](https://github.com/launchdarkly/ios-eventsource) of an [Objective-C implementation](https://github.com/neilco/ios-eventsource) for use in the [LaunchDarkly iOS (Swift) SDK](https://github.com/launchdarkly/ios-client-sdk).