Bug Fixes
core: fix memory leak caused by a bug in older Node versions with HTTP keep-alive (#581)
dns: fix dns plugin not working in Node 4 (#575)
Features
core: add option to report the hostname from the tracer (#562)
koa: add support for koa-route (#561)
paperplane: add paperplane integration (#582), thanks @flintinatux!
promise: add context propagation support for promise (#570)
promise-js: add context propagation support for promise-js (#572)
Improvements
core: update analytics config with a simpler API that also fixes plugin config (#573)
core: add an alternative scope manager in pure JS for older versions of Node (#579)
Breaking Changes
The Trace Analytics client configuration per span name was removed since it was confusing and led to issues with our integrations. We are planning to bring the feature back in the future but with an easier to use API.