for iOS add timestamp to onUserLocationChange results
for iOS add timestamp to onUserLocationChange results

lelandrichardson/react-native-maps,lelandrichardson/react-native-maps,wannyk/react-native-maps,wannyk/react-native-maps,zigbang/react-native-maps,wannyk/react-native-maps,zigbang/react-native-maps,lelandrichardson/react-native-maps,wannyk/react-native-maps,zigbang/react-native-maps