swagger 1.2 with "void" response missing "responses" element in transformed swagger 2.0

[gilbode]

I'm trying to use swagger parser to transform swagger 1.2 to swagger 2.0 and validating against the JSON schema in a test to prove the transform was correct. I have several swagger 1.2 files with operations that have "void" type. When I transform these the swagger 2.0 is missing the responses element for the operation and thus consider invalid. See below for an example swagger 1.2 api description:

{
    "apiVersion": "1.0.1",
    "apis": [
        {
            "operations": [
                {
                    "method": "POST",
                    "nickname": "postCallback",
                    "notes": "",
                    "parameters": [],
                    "responseMessages": [],
                    "summary": "update the status of an asynchronously running pipeline",
                    "type": "void"
                }
            ],
            "path": "/callback"
        }
    ],
    "basePath": "http://localhost:5000",
    "consumes": [
        "application/json"
    ],
    "produces": [
        "application/json"
    ],
    "resourcePath": "/",
    "swaggerVersion": "1.2"
}