Should be able to use tabbarLayout to configure title and icons:

  config: {
    tabbarLayout: 'icon-bottom',
    platforms: {
      android: {
        tabbarLayout: 'icon-hide'
      }
    }
  } 

Adam and I came up with the following:

key: tabbarLayout
values: icon-top, icon-left, icon-right, icon-bottom, icon-hide, title-hide

deprecate tabbarIcons