GraphQL schema update

[github-actions]

🤖 This automated pull request brought to you by a GitHub action 🤖

The GraphQL schema has been updated and relay-compiler has been re-run on the package source. relay-compiler failed with the following output:

Writing js
ERROR:
RelayParser: Encountered 2 error(s):
- Unknown field 'timeline' on type 'Issue'. Source: document `issueTimelineController_issue` file: `controllers/issue-timeline-controller.js`
  
  controllers/issue-timeline-controller.js (8:7)
  7:       url
  8:       timeline(
           ^
  9:         first: $timelineCount, after: $timelineCursor
  
- Unknown field 'timeline' on type 'PullRequest'. Source: document `prTimelineController_pullRequest` file: `controllers/pr-timeline-controller.js`
  
  controllers/pr-timeline-controller.js (9:7)
   8:       ...headRefForcePushedEventView_issueish
   9:       timeline(first: $timelineCount, after: $timelineCursor) @connection(key: "prTimelineContainer_timeline") {
            ^
  10:         pageInfo { endCursor hasNextPage }
  

🚨 Check out this branch to fix things so we don't break. 🚨

[codecov]

Codecov Report

Merging #2177 into master will decrease coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2177      +/-   ##
==========================================
- Coverage   92.72%   92.66%   -0.07%     
==========================================
  Files         215      215              
  Lines       12269    12271       +2     
  Branches     1796     1796              
==========================================
- Hits        11377    11371       -6     
- Misses        892      900       +8

Impacted Files	Coverage Δ
lib/controllers/pr-timeline-controller.js	33.33% <ø> (ø)	⬆️
...views/timeline-items/commit-comment-thread-view.js	100% <ø> (ø)	⬆️
lib/controllers/issue-timeline-controller.js	0% <ø> (ø)	⬆️
lib/views/issueish-timeline-view.js	97.91% <100%> (ø)	⬆️
lib/views/timeline-items/commits-view.js	100% <100%> (ø)	⬆️
lib/git-temp-dir.js	90.9% <0%> (-9.1%)	⬇️
lib/helpers.js	87.24% <0%> (-1.65%)	⬇️
lib/github-package.js	66.79% <0%> (-0.39%)	⬇️

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[smashwilson]

Here's the breaking change associated with this. Looks like an easy fix:

https://developer.github.com/v4/breaking_changes/#changes-scheduled-for-2019-10-01