react-native-intercom: Readme instructions for iOS doesn't work

The current installation instructions for iOS in the README suggests installing the package, then linking it with react-native link, and finally adding

pod 'react-native-intercom', :path => '../node_modules/react-native-intercom'

to your Cocoapods Podfile. This does not work. It leads to RCTBridgeModule.h not found errors on IntercomWrapper.h when building your project.

I’m not an expert in Cocoapods but I suspect the reason why the README suggests adding react-native-intercom to the Podfile is so that the podspec can add Intercom official pod as a dependency. However that same podspec also tells xcode to build all the iOS source code for this library.

In other words, the iOS source code for react-native-intercom is being added to the project twice, by react-native link and by Cocoapods. The cocoapods one fails because it can’t find the RCT* header files.

What worked for us on a blank new project was to:

1. yarn add react-native-intercom
2. react-native link react-native-intercom
3. Add pod 'Intercom', '> 3' to your Podfile. This only adds the source code for the Intercom’s official ios library, and not the the code for react-native-intercom which is already linked to our project.

If one of the maintainers of the project could confirm these guesses are correct I’ll be happy to send a PR for the readme 😃.