update all vendored dependencies

vendor/google.golang.org/api/internal/settings.go

@@ -16,6 +16,7 @@
 package internal
 
 import (
+	"errors"
 	"net/http"
 
 	"golang.org/x/oauth2"
@@ -34,4 +35,20 @@ type DialSettings struct {
 	HTTPClient      *http.Client
 	GRPCDialOpts    []grpc.DialOption
 	GRPCConn        *grpc.ClientConn
+	NoAuth          bool
+}
+
+// Validate reports an error if ds is invalid.
+func (ds *DialSettings) Validate() error {
+	hasCreds := ds.APIKey != "" || ds.TokenSource != nil || ds.CredentialsFile != ""
+	if ds.NoAuth && hasCreds {
+		return errors.New("options.WithoutAuthentication is incompatible with any option that provides credentials")
+	}
+	if ds.HTTPClient != nil && ds.GRPCConn != nil {
+		return errors.New("WithHTTPClient is incompatible with WithGRPCConn")
+	}
+	if ds.HTTPClient != nil && ds.GRPCDialOpts != nil {
+		return errors.New("WithHTTPClient is incompatible with gRPC dial options")
+	}
+	return nil
 }