Highlights
Beta Lightstep integration
Pull requests
Update README build status link, https://github.com/rollbar/rollbar.js/pull/856
Add opentracing integration, https://github.com/rollbar/rollbar.js/pull/860
Update naming convention for Lightstep open tracing span tags, https://github.com/rollbar/rollbar.js/pull/864
bump websocket-extensions from 0.1.3 to 0.1.4, https://github.com/rollbar/rollbar.js/pull/866