Support icon type

[ballad89]

Native base now supports icon type

Icon.propTypes = {
  ...IconNB.propTypes,
  style: PropTypes.oneOfType([
    PropTypes.object,
    PropTypes.number,
    PropTypes.array
  ]),
  name: PropTypes.string,
  ios: PropTypes.string,
  android: PropTypes.string,
  active: PropTypes.bool,
  type: PropTypes.string
};

which can be set to one of

setIcon(iconType) {
    if (iconType === undefined && this.context.theme) {
      // eslint-disable-next-line
      iconType = this.context.theme['@@shoutem.theme/themeStyle'].variables
        .iconFamily;
    }
    switch (iconType) {
    case 'AntDesign':
      this.Icon = AntDesign;
      break;
    case 'Entypo':
      this.Icon = Entypo;
      break;
    case 'EvilIcons':
      this.Icon = EvilIcons;
      break;
    case 'Feather':
      this.Icon = Feather;
      break;
    case 'FontAwesome':
      this.Icon = FontAwesome;
      break;
    case 'FontAwesome5':
      this.Icon = FontAwesome5;
      break;
    case 'Foundation':
      this.Icon = Foundation;
      break;
    case 'Ionicons':
      this.Icon = Ionicons;
      break;
    case 'MaterialCommunityIcons':
      this.Icon = MaterialCommunityIcons;
      break;
    case 'MaterialIcons':
      this.Icon = MaterialIcons;
      break;
    case 'Octicons':
      this.Icon = Octicons;
      break;
    case 'SimpleLineIcons':
      this.Icon = SimpleLineIcons;
      break;
    case 'Zocial':
      this.Icon = Zocial;
      break;
    default:
      this.Icon = Ionicons;
    }
  }

and used like this

<Icon name="exchange" type="FontAwesome" />

native-base already checks for iconType === undefined and also has a default in the switch

default:
      this.Icon = Ionicons;