Update Go modules and run go mod tidy

go.mod

@@ -12,6 +12,7 @@ require (
 	github.com/huandu/xstrings v1.3.0 // indirect
 	github.com/imdario/mergo v0.3.8
 	github.com/koron-go/prefixw v0.0.0-20181013140428-271b207a7572
+	github.com/kubermatic/machine-controller v1.11.1
 	github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de
 	github.com/mitchellh/copystructure v1.0.0 // indirect
 	github.com/pkg/errors v0.9.1
@@ -20,17 +21,15 @@ require (
 	github.com/sirupsen/logrus v1.4.2
 	github.com/spf13/cobra v0.0.6
 	github.com/spf13/pflag v1.0.5
-	golang.org/x/crypto v0.0.0-20190820162420-60c769a6c586
+	golang.org/x/crypto v0.0.0-20200214034016-1d94cc7ab1c6
 	gopkg.in/yaml.v2 v2.2.8
 	k8s.io/api v0.16.4
 	k8s.io/apiextensions-apiserver v0.16.4
 	k8s.io/apimachinery v0.16.4
 	k8s.io/client-go v0.16.4
 	k8s.io/cluster-bootstrap v0.16.4
 	k8s.io/code-generator v0.16.4
-	k8s.io/gengo v0.0.0-20191010091904-7fa3014cb28f // indirect
 	k8s.io/kube-aggregator v0.16.4
-	sigs.k8s.io/cluster-api v0.0.0-20190603191137-2ec456177c0e
 	sigs.k8s.io/controller-runtime v0.4.0
 	sigs.k8s.io/yaml v1.2.0
 )