Add assets from Twemoji 13.1.0 (#16345)

* Add assets from Twemoji 13.1.0

* Update emoji-mart

app/javascript/mastodon/features/emoji/unicode_to_unified_name.js

@@ -2,16 +2,20 @@ function padLeft(str, num) {
   while (str.length < num) {
     str = '0' + str;
   }
+
   return str;
 }
 
 exports.unicodeToUnifiedName = (str) => {
   let output = '';
+
   for (let i = 0; i < str.length; i += 2) {
     if (i > 0) {
       output += '-';
     }
+
     output += padLeft(str.codePointAt(i).toString(16).toUpperCase(), 4);
   }
+
   return output;
 };