Merge pull request #419 from storybookjs/styled-link-props

export StyledLinkProps to allow Link to be extended

Author: winkerVSbecks

src/components/Link.tsx

@@ -20,7 +20,7 @@ const LinkInner = styled.span<{ withArrow: boolean }>`
     `};
 `;
 
-interface StyledLinkProps {
+export interface StyledLinkProps {
   containsIcon?: boolean;
   secondary?: boolean;
   tertiary?: boolean;