Update file-exists to the latest version 🚀

[greenkeeper]

Version 5.0.0 of file-exists just got published.

Dependency	file-exists
Current Version	4.0.0
Type	devDependency

The version 5.0.0 is not covered by your current version range.

Without accepting this pull request your project will work just like it did before. There might be a bunch of new features, fixes and perf improvements that the maintainers worked on for you though.

I recommend you look into these changes and try to get onto the latest version of file-exists.
Given that you have a decent test suite, a passing build is a strong indicator that you can take advantage of these changes by merging the proposed change into your project. Otherwise this branch is a great starting point for you to work on the update.

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Commits

The new version differs by 5 commits.

• bc52f38 Release 5.0.0
• 366b6ab Merge pull request #10 from RobLoach/promise
• 38df71a Add Promise documentation to README.md
• e8ddb7f Fix Promise error reporting
• e1be664 Add Promise support

See the full diff

Not sure how things should work exactly?

There is a collection of frequently asked questions and of course you may always ask my humans.

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Your Greenkeeper Bot 🌴

[k8s-ci-robot]

Thanks for your pull request. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please follow instructions at https://github.com/kubernetes/kubernetes/wiki/CLA-FAQ to sign the CLA.

It may take a couple minutes for the CLA signature to be fully registered; after that, please reply here with a new comment and we'll verify. Thanks.

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[codecov]

Codecov Report

Merging #2413 into master will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #2413      +/-   ##
=========================================
+ Coverage   58.67%   58.7%   +0.03%     
=========================================
  Files         596     596              
  Lines       12843   12843              
=========================================
+ Hits         7535    7539       +4     
+ Misses       5116    5111       -5     
- Partials      192     193       +1

Impacted Files	Coverage Δ
...p/backend/integration/metric/common/aggregation.go	89.23% <0%> (+1.53%)	⬆️
src/app/backend/sync/secret.go	71.79% <0%> (+2.56%)	⬆️

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