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/google.golang.org/grpc/resolver/resolver.go

@@ -124,11 +124,6 @@ type Address struct {
 	Metadata interface{}
 }
 
-// BuildOption is a type alias of BuildOptions for legacy reasons.
-//
-// Deprecated: use BuildOptions instead.
-type BuildOption = BuildOptions
-
 // BuildOptions includes additional information for the builder to create
 // the resolver.
 type BuildOptions struct {
@@ -235,11 +230,6 @@ type Builder interface {
 	Scheme() string
 }
 
-// ResolveNowOption is a type alias of ResolveNowOptions for legacy reasons.
-//
-// Deprecated: use ResolveNowOptions instead.
-type ResolveNowOption = ResolveNowOptions
-
 // ResolveNowOptions includes additional information for ResolveNow.
 type ResolveNowOptions struct{}