Use the GitHub's Checks API (fka Statuses API)

GitHub just announced a new [status bar](https://github.com/blog/2040-clearer-mergability-information-for-pull-requests) under the comment section of the PRs. I think that the lint reviews would look better by using the [statuses API](https://developer.github.com/v3/repos/statuses/).

Start by reading the linked GitHub Checks and Statuses API documentation, then inspect how the bot currently publishes lint reviews. Done means lint results are represented in GitHub's pull-request status or checks interface as intended, rather than only through the existing review presentation.

Written by the indexing model from the issue text.