how to add background color for layer text field in mapbox-gl
<p>how to add a background color for layer text-field in mapbox-gl.. or how it can be done so that there's background box on the text-field</p>

<pre><code>map.addLayer({
    "id": "markers",
    "type": "symbol",
    "source": "markers",
    "layout": {
        "icon-image": "{marker-symbol}-15",
        "text-field": "{title}",
        "text-font": ["Open Sans Semibold", "Arial Unicode MS Bold"],
        "text-offset": [0, 0.6],
        "text-anchor": "top"
    }
});
</code></pre>