Bump version to v1.4.0-beta.2
Bump version to v1.4.0-beta.2

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