polkadot js Api for React Native debugging

New the polkadot js Api is fully compatible with React Native.

Reference:
polkadot-js/api#481
polkadot-js/api#526

How to test

$ git clone https://github.com/polkawallet-io/polkadot-api-reactNative-debugging.git

$ yarn install

Start your Substrate local Node.

$ react-native start

With another terminal:

$ react-native run-android

iOS For:

$ react-native run-ios

With another terminal:

$ react-native log-android  // or ios

The effect :

Special thanks to : @polkadot{.js} & @jacogr