Update srcset.yml

Author: foolip

features/draft/srcset.yml

@@ -5,6 +5,7 @@ spec: https://html.spec.whatwg.org/multipage/embedded-content.html#attr-img-srcs
 group: html
 caniuse: srcset
 compat_features:
+  - api.HTMLImageElement.currentSrc
   - api.HTMLImageElement.sizes
   - api.HTMLImageElement.srcset
   - api.HTMLSourceElement.sizes