Add unit-tests to ensure that all the entries in contributors.json are valid. Next step would be to run them in EWS so that we someone makes a mistake in a PR, it's easy to notice before landing.
Pull request: https://github.com/WebKit/WebKit/pull/5864
<rdar://problem/101919416>
Committed 256416@main (23e738c257d3): <https://commits.webkit.org/256416@main> Reviewed commits have been landed. Closing PR #5864 and removing active labels.