bump k8s to 1.21

Author: varshaprasad96

go.mod

@@ -6,20 +6,20 @@ require (
 	github.com/blang/semver/v4 v4.0.0
 	github.com/evanphx/json-patch/v5 v5.1.0
 	github.com/go-git/go-git/v5 v5.1.0
-	github.com/go-logr/logr v0.3.0
+	github.com/go-logr/logr v0.4.0
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
-	github.com/prometheus/client_golang v1.7.1
-	github.com/stretchr/testify v1.6.1
-	golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0
-	golang.org/x/tools v0.0.0-20200714190737-9048b464a08d
-	k8s.io/api v0.20.1
-	k8s.io/apimachinery v0.20.1
-	k8s.io/cli-runtime v0.20.1
-	k8s.io/client-go v0.20.1
+	github.com/prometheus/client_golang v1.11.0
+	github.com/stretchr/testify v1.7.0
+	golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83
+	golang.org/x/tools v0.1.0
+	k8s.io/api v0.21.1
+	k8s.io/apimachinery v0.21.1
+	k8s.io/cli-runtime v0.21.1
+	k8s.io/client-go v0.21.1
 	k8s.io/klog v1.0.0
-	k8s.io/kubectl v0.20.1
+	k8s.io/kubectl v0.21.1
 	sigs.k8s.io/cli-utils v0.16.0
-	sigs.k8s.io/controller-runtime v0.8.0
-	sigs.k8s.io/kustomize/api v0.3.2
+	sigs.k8s.io/controller-runtime v0.9.0
+	sigs.k8s.io/kustomize/api v0.8.8
 	sigs.k8s.io/yaml v1.2.0
 )