chore: add tests for Node 16

[MichaelDeBoey]

https://nodejs.medium.com/node-js-16-available-now-7f5099a97e70

[codecov]

Codecov Report

Merging #357 (b525f21) into main (21ad89b) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main      #357   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           23        23           
  Lines          545       545           
  Branches       200       198    -2     
=========================================
  Hits           545       545           

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[gnapse]

I wonder why there's a check entry above that has not reported its status. I need to investigate before merging. Any hints that you can give?

[MichaelDeBoey]

@gnapse I think you need to update branch protection rules (in settings of this repo) like @eps1lon did after testing-library/react-testing-library#900

[github-actions]

🎉 This PR is included in version 5.12.0 🎉

The release is available on:

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

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