WIP: Add punctuations

[danieloi]

Resolves #355

Upgrades the example app to run with the current version of Xcode by upgrading the react native version that comes with it.

The only relevant change is small and found in ios/Voice/Voice.m.

Every other diff comes from upgrading the example app manually based on changes recommended here: https://react-native-community.github.io/upgrade-helper/?from=0.61.5&to=0.74.2&package=org.reactjs.native.example.VoiceTest&name=VoiceTest

Moving the example app to expo would likely make it easier to do these upgrades in the future.

What's left in this PR:

• use an object as the argument to the start method instead of the current positional arguments
• add the auto-punctuate feature to Android
• document everything