Hi! I really appreciate the time you've invested into danger and peril. It has been extremely valuable to me and many teams I've been on.

When I try to run danger.git.diffForFile in a PR, the diff object is resolved to null, unless I set DANGER_GITHUB_API_TOKEN with a personal access token in heroku. Is this by design, or is there some config/setup that I possibly missed so that peril has access to retrieve a diff for a file in a PR?

Thanks!