### Fixed:

- Spans entered twice on the same thread sometimes being completely
  exited when the more deeply-nested entry is exited (#361)
- Setting `with_ansi(false)` on `FmtSubscriber` not disabling ANSI color
  formatting for timestamps (#354)
- Incorrect reference counting in `FmtSubscriber` that could cause spans
  to not be closed when all references are dropped (#366)

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