Update jest to the latest version 🚀

[ndelangen]

Issue: #1796

What I did

Fixed the jest incompatibility with mock-fs by switching to jest.mock()

How to test

Unit tests should pass

[codecov]

Codecov Report

Merging #1799 into master will increase coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1799      +/-   ##
==========================================
+ Coverage   21.14%   21.21%   +0.07%     
==========================================
  Files         252      252              
  Lines        5693     5693              
  Branches      686      686              
==========================================
+ Hits         1204     1208       +4     
+ Misses       3970     3967       -3     
+ Partials      519      518       -1

Impacted Files	Coverage Δ
app/react/src/server/utils.js	0% <0%> (-32.15%)	⬇️
app/vue/src/server/babel_config.js	77.41% <0%> (-6.46%)	⬇️
app/vue/src/server/utils.js	53.57% <0%> (+53.57%)	⬆️

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[Hypnosphi]

LGTM

[ndelangen]

If you're approving, please just go ahead and merge.