Unable to use borderOptions.dashPattern to set dash pattern
Trying to create new shapes by running the following script, the shape is created but I am unable to set the border options properties like dashPattern. Any idea if I am doing something wrong here? Thanks

```javascript
const sketch = require('sketch')
const Shape = require('sketch/dom').Shape
const Style = require('sketch/dom').Style
const document = sketch.fromNative(context.document)
const page = document.selectedPage

var shape = new Shape({
  parent: page,
  style: {
    fills: [],
    borders: [{
        fillType: Style.FillType.color,
        position: Style.BorderPosition.Center,
        thickness: 5,
        color: '#c0ffee',
        borderOptions: {
            dashPattern: [100, 100]
        }
    }],
  },
})

// This is also not working. This is how the examples in the documentations are suggesting these should be set.
shape.style.borderOptions =  {
      dashPattern: [20, 5, 20, 5]
}

```