update kube and vendor dependencies

With kubernetes 1.18 release of client-go, signatures on methods in
generated clientsets, dynamic, metadata, and scale clients have been
modified to accept context.Context as a first argument.
Signatures of Create, Update, and Patch methods have been updated
to accept CreateOptions, UpdateOptions and PatchOptions respectively.
Signatures of Delete and DeleteCollection methods now accept
DeleteOptions by value instead of by reference.
These changes are now accommodated with this PR and client-go
and dependencies are updated to v1.18.0

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/k8s.io/code-generator/cmd/client-gen/args/args.go

@@ -49,6 +49,9 @@ type CustomArgs struct {
 	ClientsetOnly bool
 	// FakeClient determines if client-gen generates the fake clients.
 	FakeClient bool
+	// PluralExceptions specify list of exceptions used when pluralizing certain types.
+	// For example 'Endpoints:Endpoints', otherwise the pluralizer will generate 'Endpointes'.
+	PluralExceptions []string
 }
 
 func NewDefaults() (*args.GeneratorArgs, *CustomArgs) {
@@ -58,6 +61,7 @@ func NewDefaults() (*args.GeneratorArgs, *CustomArgs) {
 		ClientsetAPIPath: "/apis",
 		ClientsetOnly:    false,
 		FakeClient:       true,
+		PluralExceptions: []string{"Endpoints:Endpoints"},
 	}
 	genericArgs.CustomArgs = customArgs
 	genericArgs.InputDirs = DefaultInputDirs
@@ -79,6 +83,8 @@ func (ca *CustomArgs) AddFlags(fs *pflag.FlagSet, inputBase string) {
 	pflag.BoolVar(&ca.ClientsetOnly, "clientset-only", ca.ClientsetOnly, "when set, client-gen only generates the clientset shell, without generating the individual typed clients")
 	pflag.BoolVar(&ca.FakeClient, "fake-clientset", ca.FakeClient, "when set, client-gen will generate the fake clientset that can be used in tests")
 
+	fs.StringSliceVar(&ca.PluralExceptions, "plural-exceptions", ca.PluralExceptions, "list of comma separated plural exception definitions in Type:PluralizedType form")
+
 	// support old flags
 	fs.SetNormalizeFunc(mapFlagName("clientset-path", "output-package", fs.GetNormalizeFunc()))
 }