message: Update clap help.
diff: @@ -70,7 +70,7 @@ fn main() -> Result<(), String> {
  --coveralls [KEY] 'Coveralls key, either the repo token, or if you're using travis use $TRAVIS_JOB_ID and specify travis-{ci|pro} in --ciserver'
  --report-uri [URI] 'URI to send report to, only used if the option --coveralls is used'
  --no-default-features 'Do not include default features'
  - --features [FEATURE]... 'Features to be included in the target project'
  + --features \"f1 f2\" 'Features to be included in the target project'
  --all-features 'Build all available features'
  --all 'Alias for --workspace (deprecated)'
  --workspace 'Test all packages in the workspace'
  