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/apimachinery/pkg/runtime/conversion.go

@@ -53,14 +53,6 @@ func JSONKeyMapper(key string, sourceTag, destTag reflect.StructTag) (string, st
 	return key, key
 }
 
-// DefaultStringConversions are helpers for converting []string and string to real values.
-var DefaultStringConversions = []interface{}{
-	Convert_Slice_string_To_string,
-	Convert_Slice_string_To_int,
-	Convert_Slice_string_To_bool,
-	Convert_Slice_string_To_int64,
-}
-
 func Convert_Slice_string_To_string(in *[]string, out *string, s conversion.Scope) error {
 	if len(*in) == 0 {
 		*out = ""
@@ -178,3 +170,27 @@ func Convert_Slice_string_To_Pointer_int64(in *[]string, out **int64, s conversi
 	*out = &i
 	return nil
 }
+
+func RegisterStringConversions(s *Scheme) error {
+	if err := s.AddConversionFunc((*[]string)(nil), (*string)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_Slice_string_To_string(a.(*[]string), b.(*string), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddConversionFunc((*[]string)(nil), (*int)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_Slice_string_To_int(a.(*[]string), b.(*int), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddConversionFunc((*[]string)(nil), (*bool)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_Slice_string_To_bool(a.(*[]string), b.(*bool), scope)
+	}); err != nil {
+		return err
+	}
+	if err := s.AddConversionFunc((*[]string)(nil), (*int64)(nil), func(a, b interface{}, scope conversion.Scope) error {
+		return Convert_Slice_string_To_int64(a.(*[]string), b.(*int64), scope)
+	}); err != nil {
+		return err
+	}
+	return nil
+}