Use kube libraries v0.20.4

Signed-off-by: Shoubhik Bose <shbose@redhat.com>
(cherry picked from commit 1cf1e549)

go.mod

@@ -37,14 +37,14 @@ require (
 	github.com/xeipuuv/gojsonschema v1.2.0
 	golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad
 	golang.org/x/term v0.0.0-20201117132131-f5c789dd3221
-	k8s.io/api v0.20.2
-	k8s.io/apiextensions-apiserver v0.20.2
-	k8s.io/apimachinery v0.20.2
-	k8s.io/apiserver v0.20.2
-	k8s.io/cli-runtime v0.20.2
-	k8s.io/client-go v0.20.2
-	k8s.io/klog/v2 v2.4.0
-	k8s.io/kubectl v0.20.2
+	k8s.io/api v0.20.4
+	k8s.io/apiextensions-apiserver v0.20.4
+	k8s.io/apimachinery v0.20.4
+	k8s.io/apiserver v0.20.4
+	k8s.io/cli-runtime v0.20.4
+	k8s.io/client-go v0.20.4
+	k8s.io/klog/v2 v2.5.0
+	k8s.io/kubectl v0.20.4
 	sigs.k8s.io/yaml v1.2.0
 )