Can't add integers in Publishing information

[armonge]

While trying to use the voxa cli to generate an alexa publishing information json i realized that it's not possible to use numbers cause they always become strings in the generated json

Example:

value	key
HUB	alexa.apis.custom.interfaces[0].supportedViewports[0].mode
ROUND	alexa.apis.custom.interfaces[0].supportedViewports[0].shape
480	alexa.apis.custom.interfaces[0].supportedViewports[0].minWidth
480	alexa.apis.custom.interfaces[0].supportedViewports[0].maxWidth
480	alexa.apis.custom.interfaces[0].supportedViewports[0].minHeight
480	alexa.apis.custom.interfaces[0].supportedViewports[0].maxHeight

Expected:

 {
  "supportedViewports": [
    {
      "mode": "HUB",
      "shape": "ROUND",
      "minWidth": 480,
      "maxWidth": 480,
      "minHeight": 480,
      "maxHeight": 480
    }
  ]
}

Actual:

{
  "supportedViewports": [
    {
      "mode": "HUB",
      "shape": "ROUND",
      "minWidth": "480",
      "maxWidth": "480",
      "minHeight": "480",
      "maxHeight": "480"
    }
  ]
}