Updates lib-jitsi-meet that uses strophe.js 1.2.15. (#3020)

package-lock.json

       }
     },
     "lib-jitsi-meet": {
-      "version": "github:jitsi/lib-jitsi-meet#fefd96e0e8968c553aab6952bc7cf2116b53362e",
+      "version": "github:jitsi/lib-jitsi-meet#c101e303ea8d4712ec58a61dc9f9e2176bb759c6",
       "requires": {
         "async": "0.9.0",
         "current-executing-script": "0.1.3",
         "sdp-interop": "0.1.12",
         "sdp-simulcast": "0.2.1",
         "sdp-transform": "2.3.0",
-        "strophe.js": "github:jitsi/strophejs#1501521d305e405f4dea3f51a5473f504672a7b3",
+        "strophe.js": "1.2.15",
         "strophejs-plugin-disco": "0.0.2",
         "webrtc-adapter": "github:webrtc/adapter#1eec19782b4058d186341263e7d049cea3e3290a",
         "yaeti": "1.0.1"
       "dev": true
     },
     "strophe.js": {
-      "version": "github:jitsi/strophejs#1501521d305e405f4dea3f51a5473f504672a7b3"
+      "version": "1.2.15",
+      "resolved": "https://registry.npmjs.org/strophe.js/-/strophe.js-1.2.15.tgz",
+      "integrity": "sha512-aM5SCLltSLKubPNil28ieJ03I+15jcVX02c1/7SBVIUWRfwfxwondRJSMJpB7OBss5b3jCNxpTqig8nXncJ5yg=="
     },
     "strophejs-plugin-disco": {
       "version": "0.0.2",

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#fefd96e0e8968c553aab6952bc7cf2116b53362e",
+    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#c101e303ea8d4712ec58a61dc9f9e2176bb759c6",
     "lodash": "4.17.4",
     "moment": "2.19.4",
     "postis": "2.2.0",
     "react-redux": "5.0.7",
     "redux": "4.0.0",
     "redux-thunk": "2.2.0",
-    "strophe.js": "github:jitsi/strophejs#1.2.14-1",
-    "strophejs-plugin-disco": "0.0.2",
     "styled-components": "1.4.6",
     "url-polyfill": "github:github/url-polyfill#39734186de44612bc5a16eb25f5407adcc5b2e7c",
     "uuid": "3.1.0",