)

Our "too many files" config import test fails on case-insensitive file
systems, such as macOS by default.

Our fixture folder had a bunch of files that would get removed on these
file systems. For example, one of `0a` and `0A` would get removed. That
meant that there were fewer than 10,001 files (as expected), and the
test would fail.

We could fix this by renaming the files, but I chose to fix this by
re-creating the fixture each time we run the test. That avoids creating
a folder with 10,001 files inside, and prevents you from having to run
`npm run test:buildConfigs`.