Update SwiftFormat to v. 0.55-beta-2

[mannylopez]

Summary

Updating to 0.55-beta-2.

Also updated two breaking rule name changes in airbnb.swiftformat

- --rules blankLineAfterMultilineSwitchCase
- --rules consistentSwitchStatementSpacing
+ --rules blankLineAfterSwitchCase
+ --rules consistentSwitchCaseSpacing

[calda]

CI is failing, probably because the artifact bundle accidentally doesn't support Intel. This should fix it: nicklockwood/SwiftFormat@d39b6b8. We can try again with 0.55-beta-2.

[calda]

Thanks!