1. update clientset, deepcopy using code-generator

2. add a dummy file tools.go to force "go mod vendor" to see
code-generator as dependencies
3. add a script to update CRD
4. add a README to document CRD updating steps
run go mod tidy
update README

vendor/k8s.io/client-go/testing/actions.go

@@ -439,8 +439,8 @@ func (a ActionImpl) GetSubresource() string {
 	return a.Subresource
 }
 func (a ActionImpl) Matches(verb, resource string) bool {
-	return strings.ToLower(verb) == strings.ToLower(a.Verb) &&
-		strings.ToLower(resource) == strings.ToLower(a.Resource.Resource)
+	return strings.EqualFold(verb, a.Verb) &&
+		strings.EqualFold(resource, a.Resource.Resource)
 }
 func (a ActionImpl) DeepCopy() Action {
 	ret := a