)?Ga({to:this,from:e}).locale(this.locale()).humanize(!a):this.localeData().invalidDate()},yt.fromNow=function(e){return this.from(Ha(),e)},yt.to=function(e,a){return this.isValid()&&(D(e)&&e.isValid()||Ha(e).isValid())?Ga({from:this,to:e}).locale(this.locale()).humanize(!a):this.localeData().invalidDate()},yt.toNow=function(e){return this.to(Ha(),e)},yt.get=function(e){return v(this[e=N(e)])?this[e]():this},yt.invalidAt=function(){return L(this).overflow},yt.isAfter=function(e,a){var t=D(e)?e:H...

- kube-apiserver `--admission-control-config-file` files are now validated strictly (EnableStrict). Duplicate and unknown fields in the configuration will now cause an error. ([#128013](https://github.com/kubernetes/kubernetes/pull/128013), [@seans3](https://github.com/seans3))

  which took advantage of subdomain validation (by having dots in the name) can't
  possibly have worked, because we eventually set `pod.spec.hostname` from the `StatefulSetName`,
  and that is validated as a DNS label. ([#114172](https://github.com/kubernetes/kubernetes/pull/114172), [@thockin](https://github.com/thockin))

- Pod Affinity/AntiAffinity label selectors are now validated in the pod affinity score plugin ([#93758](https://github.com/kubernetes/kubernetes/pull/93758), [@damemi](https://github.com/damemi)) [SIG Scheduling]

    * 4. Max 20 bit for range (min network bits `<v6>/108` or <v4>/12)
    * kube-controller-manager: convert service CIDR to list `--service-cluster-ip-range=<CIDR>,<CIDR>` and make sure `IPv6DualStack` feature flag is turned on. The flag is validated as above.
    * + to use:

- Feature gate dependencies are now explicit, and validated at startup. A feature can no longer be enabled if it depends on a disabled feature. In particular, this means that `AllAlpha=true` will no longer work without enabling disabled-by-default beta features that are depended on (either with `AllBeta=true`...

* discovery.CachedDiscoveryInterface implementation returned by NewMemCacheClient has changed semantics of Invalidate method -- the cache refresh is now deferred to the first cache lookup. ([#70994](https://github.com/kubernetes/kubernetes/pull/70994), [@mborsz](https://github.com/mborsz))

- Kubeadm now propagates proxy environment variables to kube-proxy ([#84559](https://github.com/kubernetes/kubernetes/pull/84559), [@yastij](https://github.com/yastij))
- Update the latest validated version of Docker to 19.03 ([#84476](https://github.com/kubernetes/kubernetes/pull/84476), [@neolit123](https://github.com/neolit123))

### SIG Storage

[CRD Validation Expression Language](https://github.com/kubernetes/enhancements/blob/master/keps/sig-api-machinery/2876-crd-validation-expression-language/README.mdv) is promoted to beta, which makes it possible to declare how custom resources are validated using the [Common Expression Language (CEL)](https://github.com/google/cel-spec). Please see the [validation rules](https://kubernetes.io/docs/tasks/extend-kubernetes/custom-resources/custom-resource-definitions/#validation-rules) guide.