Add a version comment to the emoji preval-ed file so it is regenerated (#28700)

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

@@ -7,6 +7,10 @@
 // It's designed to be emitted in an array format to take up less space
 // over the wire.
 
+// This version comment should be bumped each time the emoji data is changed
+// to ensure that the prevaled file is regenerated by Babel
+// version: 2
+
 const { emojiIndex } = require('emoji-mart');
 let data = require('emoji-mart/data/all.json');
 const { uncompress: emojiMartUncompress } = require('emoji-mart/dist/utils/data');
@@ -15,7 +19,6 @@ const emojiMap = require('./emoji_map.json');
 const { unicodeToFilename } = require('./unicode_to_filename');
 const { unicodeToUnifiedName } = require('./unicode_to_unified_name');
 
-
 if(data.compressed) {
   data = emojiMartUncompress(data);
 }