PropTypes problem

[tarikelbannany]

you need to update you PropTypes use to support new react-native version

[michaelhelvey]

As I mentioned on the README, I'm not actively involved in maintaining this project because there are now much more useful libraries, one of which I recommend in the README. As I said, however, if someone finds this project valuable and wants to work on it, I will accept PRs. Thanks for your interest!