Avoid passing 'icon' as null if 'withIcon' is set to true

[eduhenke]

Reproducible by:

    RNToasty.Success({
      title: 'XXX',
      titleColor: "#46CC9F",
      tintColor: "#F1F9FF",
      icon: props => <AntDesign name='checkcircleo' {...props} style={props.style} />,
      withIcon: true
    });

If you remove the tintColor property, it works again

[mohamedanwer123]

+1