update setNativeProps()
update setNativeProps()

When updating `points` prop, `setNativeProps` must send a valid `d` prop to `this.root` which is a `<Path>'.
It needs more work, couldn't get it working perfectly. I'm new to RN.
Commit PR for `<Polyline>` as well.
magicismight/react-native-svg,react-native-community/react-native-svg,magicismight/react-native-art-svg,msand/react-native-svg,react-native-community/react-native-svg,react-native-community/react-native-svg,react-native-community/react-native-svg,magicismight/react-native-svg,msand/react-native-svg,magicismight/react-native-svg,msand/react-native-svg,react-native-community/react-native-svg,magicismight/react-native-svg,magicismight/react-native-svg,msand/react-native-svg,magicismight/react-native-art-svg