[no important files changed] Fix REST API tests

[rzuckerm]

I ran the tests for the example code 100 times with this script, and it passed every time:

#!/bin/bash
numIter=${1:-100}
pass=1
for i in $(seq 1 $numIter)
do
    echo
    echo "*** Iteration $i ***"
    pwsh -Command Invoke-Pester | tee output.txt
    if ! (tail -n 1 output.txt | grep -sq "Failed: 0,")
    then
        echo "FAILED!"
        pass=0
        break
    fi
done

rm -f output.txt
if [ $pass -ne 0 ]
then
    echo "PASSED"
fi

I also forced some failures and the tests failed. Here are examples of error messages where I deliberately changed the expected values in the tests:

• Expected exactly @('balance', 'name', 'owed_bye', 'owes'), because those are the expected keys for expected["users"][1], but got @('balance', 'name', 'owed_by', 'owes').
• Expected exactly 3, because that is the expected number of expected["users"] values, but got 2.
• Expected exactly 1, because that is the expected value for expected["users"][0]["balance"], but got 0.

[github-actions]

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[github-actions]

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[github-actions]

This PR touches files which potentially affect the outcome of the tests of an exercise. This will cause all students' solutions to affected exercises to be re-tested.

If this PR does not affect the result of the test (or, for example, adds an edge case that is not worth rerunning all tests for), please add the following to the merge-commit message which will stops student's tests from re-running. Please copy-paste to avoid typos.

[no important files changed]

For more information, refer to the documentation. If you are unsure whether to add the message or not, please ping @exercism/maintainers-admin in a comment. Thank you!

[rzuckerm]

@glaxxie Please hold off on reviewing this. I would like to revisit the error reporting. I think I can do a better job now that I know what the -Because option displays.

[rzuckerm]

@glaxxie It is ready for review