bump octokit constraint
bump requirement on api server
update changelog
version bump 3.1.0
Define Source#inspect (otherwise it prints the entire universe)
Refactor `berks outdated` to pick the highest version
Update human formatter to use new Berksfile#outdated hash
Update JSON formatter to use new Berksfile#outdated hash
Define Source#hash to be the URI's host to prevent duplicates
Fix failing cucumber tests
Only use a single API source for outdated