Improve iOS calendar source detection (#347)
Improve iOS calendar source detection (#347)

* Improve iOS calendar source detection

fallback to default, and potentially to an exange calendar

* Fixed source detection to only support iCloud or local/subscribed source

* Update RNCalendarEvents.m

Co-authored-by: Max Thirouin <46f1a0bd5592a2f9244ca321b129902a06b53e03@moox.io>
wmcmahan/react-native-calendar-events,wmcmahan/react-native-calendar-events,wmcmahan/react-native-calendar-events