- [apm] feat: Add `options.autoPopAfter` parameter to `pushActivity` to prevent never-ending spans (2459)
- [apm] fix: Use monotonic clock to compute durations (2441)
- [core] ref: Remove unused `sentry_timestamp` header (2458)
- [node] ref: Drop Node v6, add Node v12 to test matrix, move all scripts to Node v12 (2455)
- [utils] ref: Prevent instantiating unnecessary Date objects in `timestampWithMs` (2442)
- [browser] fix: Mark transactions as event.transaction in breadcrumbs correctly