Update addons docs for 2020
Update addons docs for 2020

kubernetes/minikube,kubernetes/minikube,kubernetes/minikube,kubernetes/minikube,warmchang/minikube,dalehamel/minikube,dalehamel/minikube,kubernetes/minikube,warmchang/minikube,warmchang/minikube,dalehamel/minikube,kubernetes/minikube,warmchang/minikube,warmchang/minikube,kubernetes/minikube,warmchang/minikube,warmchang/minikube