chore(deps): update LJM to 1bd6ee4b12

Updates lib-jitsi-meet to have the getConnection getter in
JitsiConference.

package-lock.json

       }
     },
     "lib-jitsi-meet": {
-      "version": "github:jitsi/lib-jitsi-meet#e59d8b4efd52e36750379e9cbd08fd50ab40c1ea",
-      "from": "github:jitsi/lib-jitsi-meet#e59d8b4efd52e36750379e9cbd08fd50ab40c1ea",
+      "version": "github:jitsi/lib-jitsi-meet#1bd6ee4b1207e6fd57f5b7c15cc17e0a6087f26d",
+      "from": "github:jitsi/lib-jitsi-meet#1bd6ee4b1207e6fd57f5b7c15cc17e0a6087f26d",
       "requires": {
         "@jitsi/sdp-interop": "0.1.13",
         "@jitsi/sdp-simulcast": "0.2.1",
       "integrity": "sha512-OfWGQTb9vnwRjwtA2QwpG2ICclHC3pgXZO5xt8H2EfgDquO0qVdSb5T88L4qJVAEugbS56pAuV4XZM58UX8ulw=="
     },
     "rtcpeerconnection-shim": {
-      "version": "1.2.11",
-      "resolved": "https://registry.npmjs.org/rtcpeerconnection-shim/-/rtcpeerconnection-shim-1.2.11.tgz",
-      "integrity": "sha512-Vns4aLKXTrLZCjDOlPZL1nymFiSpqs15TeF+wG1TSLO1kXRrCuT5SjL+Zb8RCP7t3JNfnCuTn+qMlCGQu5NvhQ==",
+      "version": "1.2.12",
+      "resolved": "https://registry.npmjs.org/rtcpeerconnection-shim/-/rtcpeerconnection-shim-1.2.12.tgz",
+      "integrity": "sha512-7v/mpRyCRjVrTr3pqI9ouXzKGtbSg+iJ54fERZCGYc6AwvkTe6WWeKWG4OmG0H3dWkr1NNASyGieE0Q0hMJviQ==",
       "requires": {
         "sdp": "^2.6.0"
       }

package.json

     "jquery-i18next": "1.2.0",
     "js-md5": "0.6.1",
     "jwt-decode": "2.2.0",
-    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#e59d8b4efd52e36750379e9cbd08fd50ab40c1ea",
+    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#1bd6ee4b1207e6fd57f5b7c15cc17e0a6087f26d",
     "lodash": "4.17.4",
     "moment": "2.19.4",
     "postis": "2.2.0",