title: Github API Webhook/Notification for All checks passed on PR
body: <p>I have an app that makes changes to a repo on a new branch and commits it to a repo, then creates a PR. The PR starts two builds - one for travis, and one for jenkins. I was wondering if there's a way I can receive a notification once <strong>all the checks</strong> have passed on the PR, so that my app can then merge the PR. Currently I only see a way on github to setup a status event that only notifies me when <strong>one</strong> of the statuses updates. </p>
  
  <p>One way I could do this is to store this information somewhere as each bulid passes one by one, and merge when they all finish. However, I'd like to avoid having to store information somewhere as I'm hoping for an ephemeral implementation. </p>
  
  <p>Another way I was thinking about doing it is: once a <a href="https://developer.github.com/v3/activity/events/types/#statusevent" rel="nofollow noreferrer">status event</a> is received, I could parse the statuses_url for the head commit, and verify the state of the other builds. The problem <em>I think</em> with this is that the statuses_url displays <strong>all</strong> builds for this <em>head</em> and not necessarily the ones associated with the PR. </p>
  
  <p>I was wondering if there is a way to receive a single notification once all checks have completed and report their status in tandem. </p>