Fix gemoji in readme.md

wooorm · wooorm · commit 27b98eaf93fd · 2017-02-05T19:23:15.000+01:00
diff --git a/README.md b/README.md
@@ -2,7 +2,7 @@
 
 Transform [HAST][] (HTML) to [MDAST][] (markdown).
 
-> :warn: Work in progress :warn
+> :warning: Work in progress :warning:
 > See [GH-3][3] for progress.
 
 ## Installation
