React Native - TSC Support - Platform Specific Typings

Typescript definition file conflicts. 

Platform: React Native
Scripting: Typescript 

```
import Picker, { Popup } from "rmc-picker";

// TSC Compile Error. 
[ts] Module '"/doeworks/src/mobile/node_modules/rmc-picker/lib"' has no exported member 'Popup'. [2305]
```