Changed `Error` to `IncorrectUsageError` in `package-json`
Changed `Error` to `IncorrectUsageError` in `package-json`

no issue

- `Error` is very generic for this case and `IncorrectUsageError`
  will populate the resulting error with the correct error code
- the `message` was pulled out to its own statement so we can avoid long
  lines

TryGhost/Ghost,TryGhost/Ghost,TryGhost/Ghost