update todo in readme
update todo in readme

barakcoh/react-native-facebook-login,joshbedo/react-native-facebook-login,visigoth/react-native-facebook-login,joshbedo/react-native-facebook-login,visigoth/react-native-facebook-login,amsardesai/react-native-facebook-login,josebalius/react-native-facebook-login,elliottsj/react-native-facebook-login,elliottsj/react-native-facebook-login,barakcoh/react-native-facebook-login,josebalius/react-native-facebook-login,amsardesai/react-native-facebook-login