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/gonum.org/v1/gonum/graph/doc.go

@@ -0,0 +1,9 @@
+// Copyright ©2014 The Gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package graph defines graph interfaces.
+//
+// Routines to test contract compliance by user implemented graph types
+// are available in gonum.org/v1/gonum/graph/testgraph.
+package graph // import "gonum.org/v1/gonum/graph"