Models references in a property using oneOf are not being generated in 0.5.0

[remkoboschker]

NSwag generates a swagger file that represents nullable properties like below. The Name model is not generated after the latest release.

{
  components: {
    schemas: {
      dto: {
        type: object,
        properties: {
          name: {
             nullable: true,
             oneOf: [
                {
                    $ref: #/components/schemas/Name
                }
            ]
        }
     }
  }
}