Update travis.yml to work with carthage releases
Update travis.yml to work with carthage releases

pusher-community/pusher-websocket-swift,pusher/pusher-websocket-swift,pusher/pusher-websocket-swift,goose2460/pusher-websocket-swift,pusher/pusher-websocket-swift,goose2460/pusher-websocket-swift,pusher-community/pusher-websocket-swift