bump version to 4.3.1 to improve document on npm.
bump version to 4.3.1 to improve document on npm.

react-native-community/react-native-svg,msand/react-native-svg,magicismight/react-native-svg,magicismight/react-native-svg,msand/react-native-svg,react-native-community/react-native-svg,magicismight/react-native-svg,udfalkso/react-native-svg,udfalkso/react-native-svg,udfalkso/react-native-svg,react-native-community/react-native-svg,magicismight/react-native-svg,react-native-community/react-native-svg,magicismight/react-native-art-svg,magicismight/react-native-svg,msand/react-native-svg,magicismight/react-native-art-svg,react-native-community/react-native-svg,msand/react-native-svg,udfalkso/react-native-svg