React Native Charts Wrapper Versions Save

Upgrade Charts to DGCharts

Charts is now called DGCharts to prevent conflicts with Apple's SwiftUI Charts.

fix https://github.com/wuxudong/react-native-charts-wrapper/issues/898

* updated charts to 4.1.0

* changed ios platform to 12.0

* Charts 4.1.0 upgrade

react-native remove ViewPropTypes from 0.69.0

Simplify setup and add expo support.

No need to use use_frameworks! any more.

1. upgrade to androidx abfb4919915630c02495cadaaeff1a128978f69a
2. update installation guide using rn 0.61.1
3. small bug fix , #546

fix largeValue, add drawOrder in CombinedChart update README

1. upgrade MpAndroidChart 3.1.0
2. upgrade swiftJson 5.0
3. upgrade Charts 3.3
4. compatible to swift 5.

update Charts to 3.2.2

update Examples, use react-navigation 3.x instead.