Updating Changelog for 0.28.0
Updating Changelog for 0.28.0

lightstephq/lightstep-tracer-javascript,lightstep/lightstep-tracer-javascript,lightstephq/lightstep-tracer-javascript,lightstep/lightstep-tracer-javascript,lightstep/lightstep-tracer-javascript,lightstephq/lightstep-tracer-javascript