minor: enable reactions

src/solid-xmpp-chat.js

@@ -242,6 +242,7 @@ export const SolidXMPPChat = {
           'sib-history-improved',
           'sib-mention-autocomplete',
           'sib-mention-mobile',
+          'sib-reactions',
           'sib-remove-notifications',
           'sib-reply-to-message',
           'sib-retract-file-upload',