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/github.com/emicklei/go-restful/.travis.yml

@@ -0,0 +1,6 @@
+language: go
+
+go:
+  - 1.x
+
+script: go test -v