Update go.mod in guestbook-operator

This commit updates go.mod on examples/guestbook-controller to latest.
And also fixes a nit about function name in test.

Author: atoato88

examples/guestbook-operator/controllers/guestbook_controller_test.go

@@ -24,7 +24,7 @@ import (
 	"sigs.k8s.io/kubebuilder-declarative-pattern/pkg/test/golden"
 )
 
-func TestDashboard(t *testing.T) {
+func TestGuestbook(t *testing.T) {
 	v := golden.NewValidator(t, api.SchemeBuilder)
 	dr := &GuestbookReconciler{
 		Client: v.Manager().GetClient(),

examples/guestbook-operator/go.mod

@@ -4,8 +4,8 @@ go 1.13
 
 require (
 	github.com/go-logr/logr v0.1.0
-	k8s.io/apimachinery v0.0.0-20190913080033-27d36303b655
-	k8s.io/client-go v0.0.0-20190918160344-1fbdaa4c8d90
-	sigs.k8s.io/controller-runtime v0.4.0
-	sigs.k8s.io/kubebuilder-declarative-pattern v0.0.0-20200317144824-bbf1fb2a4a9a
+	k8s.io/apimachinery v0.18.2
+	k8s.io/client-go v0.18.2
+	sigs.k8s.io/controller-runtime v0.6.0
+	sigs.k8s.io/kubebuilder-declarative-pattern v0.0.0-20200522144838-848d48e5b073
 )