add Invert GiftedChat prop
add Invert GiftedChat prop

atFriendly/react-native-friendly-chat,FaridSafi/react-native-gifted-chat,atFriendly/react-native-friendly-chat,FaridSafi/react-native-gifted-messenger,FaridSafi/react-native-gifted-messenger,atFriendly/react-native-friendly-chat,FaridSafi/react-native-gifted-chat,atFriendly/react-native-friendly-chat