refactor file watch function to use fsnotify helpers

providers/file/file.go

@@ -112,13 +112,13 @@ func (f *File) Watch(cb func(event interface{}, err error)) error {
 				// Or has the real path of the file being watched changed?
 				//
 				// If either of the above are true, trigger the callback.
-				if (onWatchedFile && event.Op&(fsnotify.Write|fsnotify.Create) != 0) ||
+				if (onWatchedFile && (event.Has(fsnotify.Create) || event.Has(fsnotify.Write))) ||
 					(curPath != "" && curPath != realPath) {
 					realPath = curPath
 
 					// Trigger event.
 					cb(nil, nil)
-				} else if onWatchedFile && event.Op&fsnotify.Remove != 0 {
+				} else if onWatchedFile && event.Has(fsnotify.Remove) {
 					cb(nil, fmt.Errorf("file %s was removed", event.Name))
 					break loop
 				}