Prevent rendering fetch results arriving out of order

[til]

Before, a slow server response arriving after the response to a later request would cause outdated results to be rendered.

Example sequence of events:

1. user types "ab", request for q=ab starts
2. user types "cd", request for q=abcd starts
3. response for q=abcd arrives and is rendered
4. response for q=ab arrives and should be discarded

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I've reproduced it locally with a test server that echos the search with "You searched for ..." and artificially delays the response to q=ab by 2s. At the end of the video, it shows "You searched for ab", but it should show "You searched for abcd".

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Give me a hint how to test this with cypress and I can give it a try. Something with intercept returning a promise?

Somewhat related to #137 .

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[til]

I should add that I've experienced this behaviour in production on a server with high variability in search response time (20ms-1000ms) and data-autocomplete-delay-value set to 100. Without these two factors, you might never see it.