deps: update LJM to bring in new audio levels and e2ee tweaks

Updates LJM to ff1813cbb2

package-lock.json

@@ -10725,8 +10725,8 @@
       }
     },
     "lib-jitsi-meet": {
-      "version": "github:jitsi/lib-jitsi-meet#cd008d726f1f57562eb5d8e6a3cd91c7e69826a0",
-      "from": "github:jitsi/lib-jitsi-meet#cd008d726f1f57562eb5d8e6a3cd91c7e69826a0",
+      "version": "github:jitsi/lib-jitsi-meet#ff1813cbb2e7d36f1cc0bbc2b8baa0a16c6346a4",
+      "from": "github:jitsi/lib-jitsi-meet#ff1813cbb2e7d36f1cc0bbc2b8baa0a16c6346a4",
       "requires": {
         "@jitsi/js-utils": "1.0.0",
         "@jitsi/sdp-interop": "1.0.3",

package.json

@@ -56,7 +56,7 @@
     "jquery-i18next": "1.2.1",
     "js-md5": "0.6.1",
     "jwt-decode": "2.2.0",
-    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#304b0a2b4e18216d792f499c74fc24bc3849303e",
+    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#ff1813cbb2e7d36f1cc0bbc2b8baa0a16c6346a4",
     "libflacjs": "github:mmig/libflac.js#93d37e7f811f01cf7d8b6a603e38bd3c3810907d",
     "lodash": "4.17.13",
     "moment": "2.19.4",