change default name of options to kebab-case

[tacman]

        #[Option(description: 'do not actually update')] // default name: 'dry-run' ? 
        bool    $dryRun,

It seems to me that the default name should be 'dry-run', since I don't think camelCase is used as frequently.

https://commons.apache.org/proper/commons-cli/

bin/console do:something --dryRun
bin/console do:something --dry-run

All Symfony commands:

  -n, --no-interaction  Do not ask any interactive question
  -e, --env=ENV         The Environment name. [default: "dev"]
      --no-debug        Switch off debug mode.

Of course, that's a BC change.

[kbond]

Good idea, I'll add to my 2.0 checklist

[tacman]

I see that this is coming, indeed I submitted a request for a more detailed deprecation warning #67