Support tvOS

[gustavogenovese]

New Issue Checklist

• [x] I have read and understood the CONTRIBUTING guide
• [X] I have read the Documentation
• [X] I have searched for a similar issue in the project and found none

Issue Info

Info	Value
Platform Name	tvos
Platform Version	9.0
Integration Method	cocoapods
Xcode Version	Xcode 11.0
Repro rate	all the time (100%)

Issue Description and Steps

Currently, there's no support to build the library for tvOS using Cocoapods. This is a blocker to use Microsoft CodePush on with React Native apps on tvOS.

[lolgear]

@gcesarmza Do you know how to check tvOS version at compile time? I would like to know if there is a constant tvOS_version_max_allowed. I can't find it.

[gustavogenovese]

Sorry, I don't know