Fix: bump jitsi-xmpp-extensions. (#1740)
Fix: bump jitsi-xmpp-extensions. (#1740)

Work around bug in jxmpp 1.0.1 parsing a JID localpart containing an @ character.
jitsi/jitsi-videobridge,jitsi/jitsi-videobridge,jitsi/jitsi-videobridge,jitsi/jitsi-videobridge,jitsi/jitsi-videobridge,jitsi/jitsi-videobridge,jitsi/jitsi-videobridge