✨ Improvements
- Don't use cached in-app messages if the SDK encounters an error fetching them or when the server returns none (OneSignal/OneSignal-iOS-SDK#1499)
- Improve segment membership calculation that allows for fetching more accurate and updated in-app messages for a user (OneSignal/OneSignal-iOS-SDK#1486)
- Fixed typo in verbose logging from 'occured' to 'occurred' (OneSignal/OneSignal-iOS-SDK#1500)