Missing `requiresMainQueueSetup` implementation

[te-online]

• analytics-react-native version: 2.0.0-pilot
• Integrations versions (if used): n/a
• React Native version: 0.64.3
• iOS or Android or both? iOS

Steps to reproduce
Start app with analytics-react-native installed

Expected behavior
No warnings are logged

Actual behavior
A warning is logged

Module AnalyticsReactNative requires main queue setup since it overrides `init` but doesn't implement `requiresMainQueueSetup`. In a future release React Native will default to initializing all native modules on a background thread unless explicitly opted-out of.

A possible fix might be similar to the one mentioned in this thread.