Pin codecov package to the lastest master

[smashwilson]

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Requirements

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Description of the Change

Upgrade the codecov package to the lastest commit on master to take advantage of codecov/codecov-node#114, which should report additional build metadata (like the PR number) from Azure DevOps builds. I'm hopeful that this will make the coverage report a bit more useful.

Alternate Designs

I could also fork the package and publish it under @smashwilson like I did for the test runner. This is slightly less effort though, and this way Greenkeeper will let us know when the next upstream release happens.

Benefits

Poking around the CodeCov UI, it looks like coverage reports submitted as pull requests have slightly different functionality than the builds we've been seeing:

I'm particularly intrigued by the "changes" tab there.

I bet this will let us re-enable the changes build status for PR builds that I turned off in #1827 (for pull requests). It might also open the way for coverage change comments.

Possible Drawbacks

It'll take slightly longer to install. It's also a bit messy to depend on git SHAs. But hopefully that's temporary.

Applicable Issues

n/a

Metrics

n/a

Tests

If this uploads correctly, I might add tests for something we don't currently cover to see what the coverage deltas look like.

Documentation

n/a

Release Notes

n/a

User Experience Research (Optional)

"Do we, the developers, understand the coverage reports better" 😉

[codecov]

Codecov Report

Merging #1845 into master will increase coverage by 0.11%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1845      +/-   ##
==========================================
+ Coverage   90.74%   90.85%   +0.11%     
==========================================
  Files         195      195              
  Lines       10729    10727       -2     
  Branches     1570     1570              
==========================================
+ Hits         9736     9746      +10     
+ Misses        993      981      -12

Impacted Files	Coverage Δ
lib/models/repository-states/present.js	95.02% <ø> (+1.72%)	⬆️
lib/atom/decoration.js	84.33% <100%> (-0.19%)	⬇️
lib/atom/atom-text-editor.js	98% <100%> (-0.04%)	⬇️
lib/git-shell-out-strategy.js	87.7% <0%> (+0.53%)	⬆️

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[annthurium]

yay thanks!! Looking forward to improved coverage reports.

Also thanks for backfilling that test coverage.

[eddiemoore]

@smashwilson Azure pipelines have now been released as of codecov v3.2.0