### Fixed

- Updated `tracing-core` to fix incorrect calculation of the global max
  level filter (#908)

### Added

- **attributes**: Support for using `self` in field expressions when
  instrumenting `async-trait` functions (#875)
- Several documentation improvements (#832, #881, #896, #897, #911,
  #913)

Thanks to @anton-dutov, @nightmared, @mystor, and @toshokan for
contributing to  this release!

Signed-off-by: Eliza Weisman <eliza@buoyant.io>