Please add ability to change order of groups

[attenzione]

trafficstars

You have defined it as [special, positioning, boxModel, typography, etc]. I would like to be able to change the predefined order of groups because I don't agree with such an order. Can you add an option for the plugin? Something like:

    "plugin/rational-order": [
      true,
      {
        "border-in-box-model": false,
        "empty-line-between-groups": false,
        "groups-order": ["box-model", "positioning", "visual", ... ]
      }
    ]