API for getting repository topics?

Is it possible to get all repository topics?

[m1guelpf]

@mkoske I think the only possible way to do this is using GraphQL...

[acrobat]

Github has an api endpoint for this but it's still in preview mode. See https://developer.github.com/v3/repos/#list-all-topics-for-a-repository

We don't currently have support for this endpoint but feel free to submit a PR for this! Or you can call that endpoint manually like this

[acrobat]

Fixed in #657