change example in readme
change example in readme

use the default example, in android 5.1 will get below error:
Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. Check the render method of `EditProfile`.

change the example, to solve this issue
cnjon/react-native-datetime,cnjon/react-native-datetime