* kubeadm allows the kubelets in the cluster to automatically renew their client certificates ([#53252](https://github.com/kubernetes/kubernetes/pull/53252), [@kad](https://github.com/kad))
* Bumped Heapster version to 1.4.3 - more details https://github.com/kubernetes/heapster/releases/tag/v1.4.3. ([#53377](https://github.com/kubernetes/kubernetes/pull/53377), [@loburm](https://github.com/loburm))

- Kube-controller-manager: the `--horizontal-pod-autoscaler-use-rest-clients` flag and Heapster support in the horizontal pod autoscaler, deprecated since 1.12, is removed. ([#90368](https://github.com/kubernetes/kubernetes/pull/90368), [@serathius](https://github.com/serathius))

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