Upgrade dependencies (#131)

Signed-off-by: Cornelius Weig <[email protected]>

go.mod

@@ -6,15 +6,15 @@ require (
 	github.com/imdario/mergo v0.3.7 // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/sirupsen/logrus v1.7.0
-	github.com/spf13/cobra v1.1.1
+	github.com/spf13/cobra v1.1.3
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/viper v1.7.1
-	github.com/stretchr/testify v1.6.1
+	github.com/stretchr/testify v1.7.0
 	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e
-	k8s.io/api v0.19.4
-	k8s.io/apimachinery v0.19.4
-	k8s.io/cli-runtime v0.19.4
-	k8s.io/client-go v0.19.4
+	k8s.io/api v0.20.2
+	k8s.io/apimachinery v0.20.2
+	k8s.io/cli-runtime v0.20.2
+	k8s.io/client-go v0.20.2
 )
 
 go 1.15