Update Kubernetes packages to v1.21.1

Signed-off-by: Stefan Prodan <[email protected]>

go.mod

@@ -7,15 +7,14 @@ require (
 	github.com/aws/aws-sdk-go v1.37.32
 	github.com/davecgh/go-spew v1.1.1
 	github.com/go-logr/zapr v0.3.0
-	github.com/google/go-cmp v0.5.2
-	github.com/prometheus/client_golang v1.9.0
+	github.com/google/go-cmp v0.5.5
+	github.com/prometheus/client_golang v1.11.0
 	github.com/stretchr/testify v1.7.0
 	go.uber.org/zap v1.14.1
-	golang.org/x/tools v0.1.0 // indirect
 	gopkg.in/h2non/gock.v1 v1.0.15
-	k8s.io/api v0.20.4
-	k8s.io/apimachinery v0.20.4
-	k8s.io/client-go v0.20.4
-	k8s.io/code-generator v0.20.4
-	k8s.io/klog/v2 v2.4.0
+	k8s.io/api v0.21.1
+	k8s.io/apimachinery v0.21.1
+	k8s.io/client-go v0.21.1
+	k8s.io/code-generator v0.21.1
+	k8s.io/klog/v2 v2.8.0
 )