go-client: Required Tag for property does not function correctly

[alexthemayers]

                  domains:
                    type: array
                    required: [domain]
                    items:
                      type: object
                      required: [name, enabled]
                      properties:
                        explicit_domain_id:
                          type: string
                        id:
                          type: string
                        name:
                          type: string
                        description:
                          type: string
                        enabled:
                          type: boolean

An open api definition such as this does not cause the generated code to omit the omitempty json tag for the domain, name, and enabled fields in the generated structs.