Update exercises with latest canonical data

[robkeim]

I started the first batch of this work in #487 but there are still three exercises remaining (as of Nov 12):

• AllYourBase (changed to using "error" structure)
• BeerSong (changed to returning an array which isn't currently being formatted multi-line. That means the test validating the entire song is a reaaalllllyyyyy long line :) I think we should update the array to be able to be formatted multiline)
• NthPrime (changed to using "error" structure)

@ErikSchierboom FYI

[ErikSchierboom]

I'm working on this

[ErikSchierboom]

@robkeim PR #492 doesn't include the BeerSong update, which I've included in a new issue: #493.