switch to using extracted jsdom-context-require

[mlrawlings]

Description

❌ test/__utils__/create-module-context.js
❌ test/__utils__/create-jsdom-module-context.js
✅ jsdom-context-require

Checklist:

• My code follows the code style of this project.
• I have updated/added documentation affected by my changes.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

Disclaimer: Contributions via GitHub pull requests are gladly accepted from their original author. Along with any pull requests, please state that the contribution is your original work and that you license the work to the project under the project's open source license. Whether or not you state this explicitly, by submitting any copyrighted material via pull request, email, or other means you agree to license the material under the project's open source license and warrant that you have the legal authority to do so.

[codecov]

Codecov Report

Merging #1071 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1071      +/-   ##
==========================================
+ Coverage   90.51%   90.52%   +<.01%     
==========================================
  Files         305      305              
  Lines       11644    11644              
==========================================
+ Hits        10540    10541       +1     
+ Misses       1104     1103       -1

Impacted Files	Coverage Δ
src/morphdom/specialElHandlers.js	87.87% <0%> (+3.03%)	⬆️

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[coveralls]

Coverage increased (+90.5%) to 90.527% when pulling 5729a7e on jsdom-context-require into 47e2dfe on master.