Update lib-jitsi-meet and add the RED option to config.js.

config.js

     // Valid values are in the range 6000 to 510000
     // opusMaxAverageBitrate: 20000,
 
+    // Enables redundancy for Opus
+    // enableOpusRed: false
+
     // Video
 
     // Sets the preferred resolution (height) for local video. Defaults to 720.

package-lock.json

       }
     },
     "lib-jitsi-meet": {
-      "version": "github:jitsi/lib-jitsi-meet#7868a6c1855b76c18b22545e128366786faae321",
-      "from": "github:jitsi/lib-jitsi-meet#7868a6c1855b76c18b22545e128366786faae321",
+      "version": "github:jitsi/lib-jitsi-meet#65df5b1da6bb6934e9d42f50d95aae0df6a5fd90",
+      "from": "github:jitsi/lib-jitsi-meet#65df5b1da6bb6934e9d42f50d95aae0df6a5fd90",
       "requires": {
         "@jitsi/js-utils": "1.0.0",
         "@jitsi/sdp-interop": "1.0.3",

package.json

     "jquery-i18next": "1.2.1",
     "js-md5": "0.6.1",
     "jwt-decode": "2.2.0",
-    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#7868a6c1855b76c18b22545e128366786faae321",
+    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#65df5b1da6bb6934e9d42f50d95aae0df6a5fd90",
     "libflacjs": "github:mmig/libflac.js#93d37e7f811f01cf7d8b6a603e38bd3c3810907d",
     "lodash": "4.17.19",
     "moment": "2.19.4",

react/features/base/config/configWhitelist.js

     'enableInsecureRoomNameWarning',
     'enableLayerSuspension',
     'enableLipSync',
+    'enableOpusRed',
     'enableRemb',
     'enableScreenshotCapture',
     'enableTalkWhileMuted',