feat: enable lipsync by default

modules/xmpp/moderator.js

@@ -174,13 +174,11 @@ Moderator.prototype.createConferenceIq =  function () {
                 value: true
             }).up();
     //}
-    if (this.options.connection.enableLipSync !== undefined) {
-        elem.c(
-            'property', {
-                name: 'enableLipSync',
-                value: this.options.connection.enableLipSync
-            }).up();
-    }
+    elem.c(
+        'property', {
+            name: 'enableLipSync',
+            value: false !== this.options.connection.enableLipSync
+        }).up();
     if (this.options.conference.audioPacketDelay !== undefined) {
         elem.c(
             'property', {

modules/xmpp/xmpp.js

@@ -122,7 +122,7 @@ XMPP.prototype.initFeaturesList = function () {
         //disco.addFeature('urn:ietf:rfc:5576'); // a=ssrc
 
         // Enable Lipsync ?
-        if (this.options.enableLipSync && RTCBrowserType.isChrome()) {
+        if (RTCBrowserType.isChrome() && false !== this.options.enableLipSync) {
             logger.info("Lip-sync enabled !");
             this.connection.disco.addFeature('http://jitsi.org/meet/lipsync');
         }