On demand error options

[aaronfay]

Adds missing explicit options for errorOnFail and errorOnScreenshotFail for execute on demand. These options still work without these definitions, this change just explicitly lists them in the command help:

ghost-inspector test execute-on-demand <organizationId> <file> [options]

Execute an on-demand test against your organization providing the path to your local JSON <file>.

Options:
  --version                Show version number                                                                 [boolean]
  --apiKey                 Your Ghost Inspector API key. You may also pass GHOST_INSPECTOR_API_KEY through your
                           environment.
  --json                   Provide output in JSON format.
  --jsonInput              Provide options input in JSON format
  --help                   Show help                                                                           [boolean]
  --errorOnFail            Exit the command with a non-0 status if the test passing value is not `true`. Ignored when
                           used with --immediate.                                                       [default: false]
  --errorOnScreenshotFail  Exit the command with a non-0 status if the test screenshotComparePassing value is not
                           `true`. Ignored when used with --immediate.                                  [default: false]
  --immediate              Initiate the execution, then immediate return a response when provided
                                                                                              [boolean] [default: false]

[aaronfay]

@justinklemm I'll need you to merge this down again if you're 🆗 with the change. 🙏🏻