vendor: update github.com/rjeczalik/notify for go1.10 (#15785)

vendor/github.com/rjeczalik/notify/node.go

@@ -6,7 +6,6 @@ package notify
 
 import (
 	"errors"
-	"fmt"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -71,7 +70,11 @@ Traverse:
 		case errSkip:
 			continue Traverse
 		default:
-			return fmt.Errorf("error while traversing %q: %v", nd.Name, err)
+			return &os.PathError{
+				Op:   "error while traversing",
+				Path: nd.Name,
+				Err:  err,
+			}
 		}
 		// TODO(rjeczalik): tolerate open failures - add failed names to
 		// AddDirError and notify users which names are not added to the tree.