Unwrap variables in a way Xcode 13 can be compiled

[SRowley90]

Bug/issue: #30

Summary

Allows Documentation to be generated against Xcode 13

Dependencies

N/A

Testing

No new tests added, all current tests run and pass, no new functionality added

Checklist

Make sure you check off the following items. If they cannot be completed, provide a reason.

• [x] Added tests
• [x] Ran the ./bin/test script and it succeeded
• [x] Updated documentation if necessary

[ethan-kusters]

@swift-ci please test