message: Add note about updated command-line output to changelog.
diff: @@ -12,6 +12,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
  previously weren't and may have to be updated.
  - Criterion.rs now uses `serde` to save results. Existing results files will
  be automatically removed when benchmarks are run.
  +- Redesigned the command-line output to highlight the important information
  + and reduce noise.
  ### Added
  - Running benchmarks with the variable "CRITERION_DEBUG" in the environment will
  