Update sample search index on changes

[pkalita-lbl]

Leaving this in draft because I don't want to merge it and update the web version until after Emiley is back from ASM Microbe.

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Fixes #91

Summary

The useMiniSearch hook we use to set up a MiniSearch search index in the SampleList component accepts a documents array, but it does not track changes to this list (by design). This means that as the samples list changes (e.g. a new one is added) the search index doesn't follow along. These changes use a useEffect callback to perform a re-indexing whenever the samples list changes.

Separately I noticed as I was updating the tests that we were getting a bunch of spurious warnings (for example). This was resolved by simply updating to the latest versions of @testing-library/react and @testing-library/user-event.

[eecavanna]

Looks good to me. Thanks for linking to the "by design" conversation, and for documenting your rationale for using "remove all, add all" in useEffect. I'm comfortable with this being merged in.