service configs are lost when updating with deployer

[faryon93]

I think a vendor-update of github.com/docker/docker and github.com/fsouza/go-dockerclient would be enough to fix this.
The current version doesn't have the needed fields defined

vendor/github.com/docker/docker/api/types/swarm/container.go (Line 46-48)

        ...
        DNSConfig *DNSConfig         `json:",omitempty"`
        Secrets   []*SecretReference `json:",omitempty"`
    }

https://github.com/moby/moby/blob/master/api/types/swarm/container.go (Line 71-74)

        ...
        Secrets   []*SecretReference  `json:",omitempty"`
        Configs   []*ConfigReference  `json:",omitempty"`
        Isolation container.Isolation `json:",omitempty"`
    }

[JustAdam]

Are you able to submit a PR?