provide prerequisite diff

[haarg]

It would be nice to be able to show diffs between prerequisites between dist versions. While it's possible to diff the META files, the presentation isn't nearly as nice as something more dedicated could be.

[ranguard]

Sounds good - but lower on the priority list unless someone can provide a pull request (I've marked a volunteer needed)

[ranguard]

Moved to wish list: https://github.com/CPAN-API/cpan-api/wiki/Wishlist