Pagination component doesn't update `page` when prop is changed

This is a weird bug that @samdbeckham ran into with the pagination.

If you update the page prop, it will never update currentPage meaning you can't actually change the page by updating the prop with whatever number we pass it.

It also means that if the pagination component gets initialized before we have received the API request with the pagination headers currentPage will be undefined.

Solution would be to add a watch onto the page prop which then just updates currentPage.

/cc @ClemMakesApps