change scrollOffset type to number
change scrollOffset type to number

change scrollOffset type to number as `propTypes` expected.
franvera/react-native-scrollable-tab-view,skv-headless/react-native-scrollable-tab-view,skv-headless/react-native-scrollable-tab-view,iancanderson/react-native-scrollable-tab-view,skv-headless/react-native-scrollable-tab-view