Update releases.json to include v1.7.0
Update releases.json to include v1.7.0

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