rebase: use minikube v1.18

Minikube v1.18 has been released. This conains a fix for our `losetup`
workaround, so that can be removed now.

Updates: #1840
Signed-off-by: Niels de Vos <ndevos@redhat.com>

build.env

@@ -36,7 +36,7 @@ SNAPSHOT_VERSION=v3.0.1
 HELM_VERSION=v3.1.2
 
 # minikube settings
-MINIKUBE_VERSION=v1.17.1
+MINIKUBE_VERSION=v1.18.0
 VM_DRIVER=none
 CHANGE_MINIKUBE_NONE_USER=true