Add non-fatal firebase storage init method

[yura-hb]

Feature proposal

• Firebase Component: Storage (Auth, Core, Database, Firestore, Messaging, Storage, etc)

Add more swifty initialization for the reference on the firebase storage. At the moment Firebase Storage crashes the Swift app, if you provide link with incorrect domain to - (FIRStorageReference *)referenceForURL:(NSString *)string;

[morganchen12]

Can you describe what the desired behavior would be here if passing in an incorrect domain? Should we just return an optional instead?

[yura-hb]

@morganchen12 Hello, any behaviour with error handling is enough for this case. From my point of view, optional is enough, but you can consider for throwing a Swift error in such case.

[paulb777]

Adding for consideration for Firebase 10. At first thought, I think throwing a Swift error would be best so that the return value doesn't need to be unwrapped.

[paulb777]

Merged to master for the upcoming 10.0.0 release