message: fix: added example for statusbar
diff: -import React from 'react';
  -import { StatusBar } from 'native-base';
  +import React, { useState } from 'react';
  +import { StatusBar, Box, Text, Button } from 'native-base';
  +
  export const Example = () => {
  - return <StatusBar />;
  + const [hidden, setHidden] = useState(false);
  + const changeStatusBarVisibility = () => setHidden(!hidden);
  + return (
  + <Box flex={1} justifyContent="center" safeArea>
  + <StatusBar
  + animated={true}
  + backgroundColor="#61dafb"
  + barStyle="default"
  + showHideTransition="fade"
  + hidden={hidden}
  + />
  + <Text textAlign="center" mb={3}>
  + StatusBar Visibility:{'\n'}
  + {hidden ? 'Hidden' : 'Visible'}
  + </Text>
  + <Box p={10}>
  + <Button onPress={changeStatusBarVisibility}>Toggle StatusBar</Button>
  + </Box>
  + </Box>
  + );
  };
  