Mention snabbdom-helpers in readme

README.md

@@ -56,7 +56,9 @@ features listed below.
   * [Thunks](#thunks) to optimize the diff and patch process even further.
   * JSX support thanks to [snabbdom-jsx](https://github.com/yelouafi/snabbdom-jsx).
     There is also a Babel plugin [babel-snabbdom-jsx](https://github.com/finnsson/babel-snabbdom-jsx).
-  * Server-side HTML output provided by [snabbdom-to-html](https://github.com/acstll/snabbdom-to-html).
+  * Server-side HTML output provided by
+    [snabbdom-to-html](https://github.com/acstll/snabbdom-to-html).
+  * Compact virtual DOM creation with [snabbdom-helpers](https://github.com/krainboltgreene/snabbdom-helpers).
 
 ## Inline example