how can i use linear-gradient 
👋 Hello! 
I try to set linear gradient background for <View>, looks like dosn't work.

<View
    name={`Swatch ${name}`}
    style={{
      height: 96,
      width: 96,
      margin: 4,
      backgroundImage:"linear-gradient(#fff, #000)",
      padding: 8,
    }}> </View>