Supported Versions of Cert-Manager

[bradenwright]

Versions of relevant software used
I'm using master branch of Git as of today

What happened
Install instructions didn't work

What you expected to happen
Install instructions to work

How to reproduce it (as minimally and precisely as possible):
Install latest version of Cert-Manager and follow install instructions

Full logs to relevant components
unable to recognize ".": no matches for kind "Certificate" in version "cert-manager.io/v1alpha2"
unable to recognize ".": no matches for kind "Issuer" in version "cert-manager.io/v1alpha2"

Anything else we need to know

I'm new to Kustomize but used K8s, Kubectl and Helm a bunch. My cluster is running the latest Helm deploy of cert-manager 1.6.1 which uses a CRD of certificates.k8s.io/v1. I tried to run without cert maanger and I couldn't get pods to start. I'm in EKS. I was try to run to test env/sandbox fwiw.