message: Make description optional
diff: @@ -10,7 +10,7 @@ type Props = {
  /** Title for card */
  title: React.Node,
  /** Optional description or message for card */
  - description: string,
  + description?: string,
  /** Card content, displays in a flex-row by default */
  children: React.Node,
  /** Displays card content in a flex-column */
  