fix: test problems jest dom and paragon

[johnvente]

Description

Currently, after running "npm run test", tests will fail due to an update of @testing-library/jest-dom to v6.0.0, which has a breaking change that removes the import of @testing-library/jest-dom/extend-expect. After fixing that, you will encounter a problem with @openedx/paragon. With this fix, the tests will run properly.

Issue: #310

How to tes it

git fetch origin pull/311/head:jv/fix-test-problems
git checkout jv/fix-test-problems
npm run test

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9f1c950) 100.00% compared to head (a5c0e17) 100.00%.
Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #311   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          110       110           
  Lines         1079      1079           
  Branches       159       159           
=========================================
  Hits          1079      1079           

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