I want to upgrade my cluster version from 1.15.10 to 1.16.7.
Prior to that I'm trying to update all the APIs.

Release notes to 1.16.0 state:
The following APIs are no longer served by default:

• All resources under apps/v1beta1 and apps/v1beta2 - use apps/v1 instead
• daemonsets, deployments, replicasets resources under extensions/v1beta1 - use apps/v1 instead
• networkpolicies resources under extensions/v1beta1 - use networking.k8s.io/v1 instead
• podsecuritypolicies resources under extensions/v1beta1 - use policy/v1beta1 instead

Release notes to 1.18.0 state:
The following deprecated APIs can no longer be served.

What happened:
When I change apiVersion in my Ingress from
apiVersion: networking.k8s.io/v1beta1
to
apiVersion: networking.k8s.io/v1

I get:
no matches for kind "Ingress" in version "networking.k8s.io/v1"

What you expected to happen:

Actually, I'm a bit of confused,
as currently kind: Ingress can only be served under v1beta1.

A PR #88509 states, that some changes had to be done, before graduation of the Ingress to v1.

So, the question is:
For now, I guess I should use --runtime-config apiserver flag to re-enable apis, but later?

How can I upgrade my cluster, if in 1.18.* v1beta1 is already deprecated, while kind:ingress is moved to v1 only in 1.19 (or later)?

Provider: Azure
Cluster Version: 1.15.10
Kubectl version: "v1.16.8". (tried on 1.15.5 and "v1.18.1") as well
OS: Windows 10 Pro, 1909 (18363.720)