Automatic merge from submit-queue
Vendor github.com/square/go-jose for kubeadm and kube-discovery
**What this PR does / why we need it**:
This is to be used by `kubeadm` (#31221) and @dgoodwin's `kube-discovery` (PR pending).
***[xref kubernetes/features#11]***
***[cc @kubernetes/sig-cluster-lifecycle]***
**Special notes for your reviewer**:
This is first time I've used `godep`, so please verify if all is quite right about the diff. I'm not 100% sure if there should be secondary dependencies or not.
```release-note
NONE
```
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