Upgrade k8s.io dependencies. (#1540)

* Upgrade k8s.io dependencies.

* Change namespace in dual delegating loader test.

* Update cli-utils.

go.mod

@@ -9,22 +9,18 @@ require (
 	github.com/olekukonko/tablewriter v0.0.4
 	github.com/pkg/errors v0.9.1
 	github.com/posener/complete/v2 v2.0.1-alpha.12
-	github.com/spf13/cobra v1.0.0
+	github.com/spf13/cobra v1.1.1
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.6.1
-	golang.org/x/time v0.0.0-20191024005414-555d28b269f0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c
 	gotest.tools v2.2.0+incompatible
-	k8s.io/api v0.18.10
-	k8s.io/apimachinery v0.18.10
-	k8s.io/cli-runtime v0.18.10
-	k8s.io/client-go v0.18.10
+	k8s.io/api v0.20.4
+	k8s.io/apimachinery v0.20.4
+	k8s.io/cli-runtime v0.20.4
+	k8s.io/client-go v0.20.4
 	k8s.io/klog v1.0.0
-	k8s.io/kubectl v0.18.10
-	sigs.k8s.io/cli-utils v0.23.5
+	k8s.io/kubectl v0.20.4
+	sigs.k8s.io/cli-utils v0.23.7-0.20210316180306-70426d65771d
 	sigs.k8s.io/kustomize/cmd/config v0.9.5
-	sigs.k8s.io/kustomize/kyaml v0.10.13
+	sigs.k8s.io/kustomize/kyaml v0.10.14
 )
-
-// Fix for issue: https://github.com/ory/dockertest/issues/208#issuecomment-686820414
-replace golang.org/x/sys => golang.org/x/sys v0.0.0-20200826173525-f9321e4c35a6