Fix issue that converted to json empty dict attr.
Fix issue that converted to json empty dict attr.

auth0/react-native-lock,Zip753/react-native-lock,Zip753/react-native-lock,auth0/react-native-lock,auth0/react-native-lock,Zip753/react-native-lock,auth0/react-native-lock-ios,Zip753/react-native-lock,Zip753/react-native-lock,auth0/react-native-lock,auth0/react-native-lock-ios,auth0/react-native-lock