npm audit, dependency cleanup, delete script/check-links #797
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A couple of things to resolve all but one (#796) vulnerability in our dependencies:
npm audit fix --forcescript/check-links, along with thebroken-link-checkerandchar-spinnerdependencies. We aren't running this script in CI right now, and it currently takes longer than I was willing to wait to run, so it's probably not working the way we want it to.script/check-relative-linksstill warns us about relative link paths that may be problematic, and if we have problems with broken links we should find another tool to detect them.