Update @types/jest to the latest version 🚀

[greenkeeper[bot]]

Version 22.1.0 of @types/jest was just published.

Dependency	@types/jest
Current Version	22.0.1
Type	devDependency

The version 22.1.0 is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

It might be worth looking into these changes and trying to get this project onto the latest version of @types/jest.

If you have a solid test suite and good coverage, a passing build is a strong indicator that you can take advantage of these changes directly by merging the proposed change into your project. If the build fails or you don’t have such unconditional trust in your tests, this branch is a great starting point for you to work on the update.

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Your Greenkeeper bot :palm_tree:

[codecov[bot]]

Codecov Report

Merging #106 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #106   +/-   ##
=======================================
  Coverage   99.38%   99.38%           
=======================================
  Files           5        5           
  Lines         162      162           
  Branches       47       41    -6     
=======================================
  Hits          161      161           
  Misses          1        1

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