message: Export HeaderProps in Header.tsx
diff: @@ -2,6 +2,7 @@ import styled, {css} from 'styled-components'
  import PropTypes from 'prop-types'
  import theme from './theme'
  import {BORDER, COMMON, get, SystemCommonProps, SystemTypographyProps, SystemBorderProps, TYPOGRAPHY} from './constants'
  +import {ComponentProps} from './utils/types'
  import sx, {SxProp} from './sx'
  type StyledHeaderItemProps = SystemCommonProps & SxProp & {full?: boolean}
  @@ -108,4 +109,5 @@ HeaderLink.defaultProps = {
  theme
  }
  +export type HeaderProps = ComponentProps<typeof Header>
  export default Object.assign(Header, {Link: HeaderLink, Item: HeaderItem})
  