Adds a stroke around an arbitrary cell view's SVG node.

Available options:

Example usage:

joint.highlighters.stroke.add(cellView, 'body', 'my-highlighter-id', {
    padding: 10,
    rx: 5,
    ry: 5,
    useFirstSubpath: true,
    attrs: {
        'stroke-width': 3,
        'stroke': '#FF0000'
    }
});