Add a class argument to the figures/image shortcode

layouts/shortcodes/figures/image.html

@@ -10,13 +10,15 @@
   {{ errorf "Missing name or names parameter to figures/image" }}
 {{- end -}}
 
+{{- $class := .Get "class" -}}
+
 {{- if lt (len $imgs) 0 -}}
   {{ errorf "No images found for name(s) parameter" }}
 {{- end -}}
 
 {{- $shouldShowTitle := (.Get "shouldShowTitle") | default true -}}
 
-<figure>
+<figure {{with $class }}class="{{ . }}"{{ end }}>
   <div class=container>
     {{ range $img := $imgs -}}
       {{- $resizedImg := $img.Fit "1280x1280" -}}