--dry-run flag

[JaKXz]

Similar to npm publish's --dry-run flag, I would love to see an option to print the results of the given gh-pages to stdout. Ideally this exits with a 0 exit code for what would have been successful and 1 for a state that would fail.

If I understand correctly, I think I can do this by using the --no-push flag and checking the last commit on the specified deploy branch, but, I want to use this in CI and fail a build if gh-pages would fail.

Thanks! Been using this project for years and love it!