Hey all. Playing with the SDK and noticed that I was unable to extract the "caption" property from the [IVirtualDeviceResult](https://github.com/bespoken/virtual-device-sdk/blob/18c60001b3325dfe9d713f349745c510a66e2423/src/VirtualDevice.ts#L594-L606) type [as shown in the docs](https://read.bespoken.io/end-to-end/api/#node-js-api). <img width="758" alt="Screen Shot 2021-04-01 at 12 16 10 AM" src="https://user-images.githubusercontent.com/35381754/113242853-e8d97780-927f-11eb-89fb-b3da0d51dbb0.png">
Hey all. Playing with the SDK and noticed that I was unable to extract the "caption" property from the IVirtualDeviceResult type as shown in the docs.
