[FIX] add hitSlop to button
[FIX] add hitSlop to button

The TouchableWithoutFeedback prop `hitSlop` was missing from button. This adds that.
https://facebook.github.io/react-native/docs/touchablewithoutfeedback.html#props
kosiakMD/react-native-elements,react-native-community/React-Native-Elements,martinezguillaume/react-native-elements,kosiakMD/react-native-elements