Upgraded Strophe to 1.2.16

package-lock.json

       "dev": true
     },
     "strophe.js": {
-      "version": "1.2.15",
-      "resolved": "https://registry.npmjs.org/strophe.js/-/strophe.js-1.2.15.tgz",
-      "integrity": "sha512-aM5SCLltSLKubPNil28ieJ03I+15jcVX02c1/7SBVIUWRfwfxwondRJSMJpB7OBss5b3jCNxpTqig8nXncJ5yg=="
+      "version": "1.2.16",
+      "resolved": "https://registry.npmjs.org/strophe.js/-/strophe.js-1.2.16.tgz",
+      "integrity": "sha512-r/Uq7aqrusg25Y0qHwV48cFnMY6K/CuZdGt3EggRx3kY4sMv8lG+AFoMlrmTcYVMG1BaJvQfv9Cthw4Ll8z7fQ=="
     },
     "strophejs-plugin-disco": {
       "version": "0.0.2",

package.json

     "js-utils": "github:jitsi/js-utils#446497893023aa8dec403e0e4e35a22cae6bc87d",
     "lodash.isequal": "4.5.0",
     "sdp-transform": "2.3.0",
-    "strophe.js": "1.2.15",
+    "strophe.js": "1.2.16",
     "strophejs-plugin-disco": "0.0.2",
     "webrtc-adapter": "github:webrtc/adapter#1eec19782b4058d186341263e7d049cea3e3290a",
     "yaeti": "1.0.1"