Allow custom Image component in Card.Cover

**Is your feature request related to a problem? Please describe.**
The Image component from react-native has issues with passing headers, the headers are necessary when images require authentication.

**Describe the solution you'd like**
A possible fix is to allow the user to provide a custom image component to use e.g: Image from expo-image

**Describe alternatives you've considered**
I don't see alternatives other than defining my own Card.Cover by copying the code and adding expo-image instead react-native's one.

**Additional context**