upgrade

Imports

• github.com/kubermatic/kubeone/pkg/util
• github.com/Masterminds/semver
• github.com/kubermatic/kubeone/pkg/config
• github.com/kubermatic/kubeone/pkg/features
• github.com/kubermatic/kubeone/pkg/ssh
• github.com/kubermatic/kubeone/pkg/templates/kubeadm
• github.com/pkg/errors
• k8s.io/api/core/v1
• k8s.io/apimachinery/pkg/apis/meta/v1
• k8s.io/apimachinery/pkg/runtime
• k8s.io/client-go/util/retry
• sigs.k8s.io/cluster-api/pkg/apis/cluster/v1alpha1
• sigs.k8s.io/controller-runtime/pkg/client
• sigs.k8s.io/controller-runtime/pkg/controller/controllerutil

Standard library imports

• context
• fmt
• strings