Add web support #455

Summary

There is a need for people using react-native-web to also cover web platform with a single lib.
In the expo world we used to rely on expo-analytics-segment (see instructions here) but as you guys develop this package it seems web support wont ever come on their side and package will be deprecated at some point. See here

Proposed Solution

Based on Platform, route to either the React or React-Native version ?