added renderNope and renderYup handlers
added renderNope and renderYup handlers

for backwards compatibility, showYup and showNope still work, but only if a custom renderNope/Yup method isn't provided. if it wasn't for backwards compatibility, i would have just removed them to keep the API surface minimal (because obviously you can hide them by returning nothing from your own renderYup/Nope methods).
parachute-io/react-native-tinder-swipe-cards,dcworldwide/react-native-tinder-swipe-cards,meteor-factory/react-native-tinder-swipe-cards