keep quotes around the value optional for now
keep quotes around the value optional for now

see:
https://github.com/luggit/react-native-config/pull/98#issuecomment-297559873

luggit/react-native-config,luggit/react-native-config,luggit/react-native-config,luggg/react-native-config,luggit/react-native-config,luggg/react-native-config,luggit/react-native-config,luggit/react-native-config,luggg/react-native-config