export validEmojiNames for autocomplete

app/assets/javascripts/emoji/index.js

@@ -55,4 +55,5 @@ export {
   getUnicodeSupportMap,
   isEmojiNameValid,
   isEmojiUnicodeSupported,
+  validEmojiNames,
 };

app/assets/javascripts/gfm_auto_complete.js

 import { glEmojiTag } from './behaviors/gl_emoji';
-import { emojiMap, emojiAliases } from './emoji';
+import { validEmojiNames } from './emoji';
 import glRegexp from './lib/utils/regexp';
 import AjaxCache from './lib/utils/ajax_cache';
 
@@ -374,7 +374,7 @@ class GfmAutoComplete {
     if (this.cachedData[at]) {
       this.loadData($input, at, this.cachedData[at]);
     } else if (GfmAutoComplete.atTypeMap[at] === 'emojis') {
-      this.loadData($input, at, Object.keys(emojiMap).concat(Object.keys(emojiAliases)));
+      this.loadData($input, at, validEmojiNames);
     } else {
       AjaxCache.retrieve(this.dataSources[GfmAutoComplete.atTypeMap[at]], true)
         .then((data) => {