test: fix coverage

[kentcdodds]

What: fix coverage

Why: I merged #381 without realizing that it didn't have 100% coverage. Now it wont be released. Unless I'm mistaken, we don't need to have coverage on that else branch because it's temporary code anyway.

How: add istabul ignore comment

Checklist:

• Documentation added to the
  docs site N/A
• I've prepared a PR for types targetting https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/testing-library__dom N/A
• Tests
• Ready to be merged
  

[kentcdodds]

cc @eps1lon, if this is incorrect and you can think of a test case we could write to get coverage on this, then feel free to add that. Thanks!

[kentcdodds]

🎉 This PR is included in version 6.8.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[eps1lon]

cc @eps1lon, if this is incorrect and you can think of a test case we could write to get coverage on this, then feel free to add that. Thanks!

That particular bug is going to be fixed soon (PR has been approved and is waiting for merge+release). I'd rather remove this code altogether once it's fixed in jsdom.

[eps1lon]

Actually it's blocked by jest. jestjs/jest#8851 needs to be released (scheduled for v25) in order to get jsdom@^15.2.0.