add caption on slideshow and lightbox

README.md

@@ -20,11 +20,7 @@ Automagical css image gallery in [Hugo](https://gohugo.io/) using shortcodes. Li
 - CSS and JS is automatically loaded the first time you use the `{{< snap-gallery >}}` shortcode on each page
 - Multiple galleries/slideshows per page supported, no interference
 - Automatic rotation of slideshow with a configurable interval. Can also be disabled.
-- Supports providing metadata such as `alt` and `title` attributes
-
-### Roadmap / untested
-
-- Captions
+- Supports providing metadata such as `alt` and `title` attributes as well as captions
 
 
 ## Installation