Feature Request: allow pagination and navigation elements to be styled

right now from the parent component, you can style the outer .VueCarousel-navigation and .VueCarousel-pagination, but not the elements:

• .VueCarousel-navigation-button
• .VueCarousel-dot

If necessary we can pass in a style like:<carousel :navigationStyle="styleObject"..., but an even better one would be to ensure the inner elements are exposed to styling from the scope of the parent component. I think a careful use of slots in the outer components might resolve this issue.