Declare global prototype in JSDOMEnvironment to fix issue #8347

[lh0x00]

I have described an issue at #8347.
We know ignores were not emitted by Typescript creating declaration files (ref microsoft/TypeScript#20360) and we can't build in your Typescript project if not skip checking types in libraries using.

I re-declared global prototype in JSDOMEnvironment class. I checked in my project and build files.

[SimenB]

Thanks!
Could you update the changelog? :)

[lh0x00]

@SimenB I updated PR and changelog.

[codecov-io]

Codecov Report

Merging #8352 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #8352      +/-   ##
==========================================
+ Coverage   62.18%   62.18%   +<.01%     
==========================================
  Files         266      266              
  Lines       10704    10703       -1     
  Branches     2604     2604              
==========================================
  Hits         6656     6656              
+ Misses       3462     3461       -1     
  Partials      586      586

Impacted Files	Coverage Δ
packages/jest-environment-jsdom/src/index.ts	37.77% <ø> (+0.82%)	⬆️

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[lh0x00]

@SimenB @jeysal Thank you very much for helping me clarify the problem!
I updated PR and it ready to merge!

[github-actions]

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