enable skin tone emojis

src/plugins/sib-emoji-picker.js

@@ -59,7 +59,7 @@ converse.plugins.add('sib-emoji-picker', {
           <emoji-picker
             .chatview='${this.chatview}'
             .model='${this.model}'
-            @emoji-click='${ev => this.insertIntoTextArea(ev.detail.emoji.unicode)}'
+            @emoji-click='${ev => this.insertIntoTextArea(ev.detail.unicode)}'
           ></emoji-picker>`;
       },
     };