feat(analytics): time since last success in connection dropped

Update LJM to 9bcc2a26cc in order to bring
in the analytics update which will add a property indicating how much
time has passed since the last successful XMPP request came through.

package-lock.json

       }
     },
     "lib-jitsi-meet": {
-      "version": "github:jitsi/lib-jitsi-meet#c0af82a215d0893f1999df299cfdfcbc9ce9e72a",
-      "from": "github:jitsi/lib-jitsi-meet#c0af82a215d0893f1999df299cfdfcbc9ce9e72a",
+      "version": "github:jitsi/lib-jitsi-meet#9bcc2a26cc94683b8ed302418695a331b450df97",
+      "from": "github:jitsi/lib-jitsi-meet#9bcc2a26cc94683b8ed302418695a331b450df97",
       "requires": {
         "@jitsi/sdp-interop": "0.1.14",
         "@jitsi/sdp-simulcast": "0.2.1",

package.json

     "js-utils": "github:jitsi/js-utils#73a67a7a60d52f8e895f50939c8fcbd1f20fe7b5",
     "jsrsasign": "8.0.12",
     "jwt-decode": "2.2.0",
-    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#c0af82a215d0893f1999df299cfdfcbc9ce9e72a",
+    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#9bcc2a26cc94683b8ed302418695a331b450df97",
     "libflacjs": "github:mmig/libflac.js#93d37e7f811f01cf7d8b6a603e38bd3c3810907d",
     "lodash": "4.17.11",
     "moment": "2.19.4",