chore(package.json): Update js-utils.

package-lock.json

       "integrity": "sha1-mGbfOVECEw449/mWvOtlRDIJwls="
     },
     "js-utils": {
-      "version": "github:jitsi/js-utils#8567f86ec2774ae1d1c47b22e3435928cf5d9771",
-      "from": "github:jitsi/js-utils#8567f86ec2774ae1d1c47b22e3435928cf5d9771",
+      "version": "github:jitsi/js-utils#7a2be83d17dc4a3d0fac4a742ab999478f326f2e",
+      "from": "github:jitsi/js-utils#7a2be83d17dc4a3d0fac4a742ab999478f326f2e",
       "requires": {
         "bowser": "2.7.0",
         "js-md5": "0.7.3",
         "strophejs-plugin-disco": "0.0.2",
         "strophejs-plugin-stream-management": "github:jitsi/strophejs-plugin-stream-management#cec7608601c1bc098543823fc658e3ddf758c009",
         "webrtc-adapter": "github:webrtc/adapter#1eec19782b4058d186341263e7d049cea3e3290a"
+      },
+      "dependencies": {
+        "js-md5": {
+          "version": "0.7.3",
+          "resolved": "https://registry.npmjs.org/js-md5/-/js-md5-0.7.3.tgz",
+          "integrity": "sha512-ZC41vPSTLKGwIRjqDh8DfXoCrdQIyBgspJVPXHBGu4nZlAEvG3nf+jO9avM9RmLiGakg7vz974ms99nEV0tmTQ=="
+        },
+        "js-utils": {
+          "version": "github:jitsi/js-utils#8567f86ec2774ae1d1c47b22e3435928cf5d9771",
+          "from": "github:jitsi/js-utils#8567f86ec2774ae1d1c47b22e3435928cf5d9771",
+          "requires": {
+            "bowser": "2.7.0",
+            "js-md5": "0.7.3",
+            "postis": "2.2.0"
+          }
+        }
       }
     },
     "libflacjs": {

package.json

     "jquery-contextmenu": "2.4.5",
     "jquery-i18next": "1.2.1",
     "js-md5": "0.6.1",
-    "js-utils": "github:jitsi/js-utils#8567f86ec2774ae1d1c47b22e3435928cf5d9771",
+    "js-utils": "github:jitsi/js-utils#7a2be83d17dc4a3d0fac4a742ab999478f326f2e",
     "jsrsasign": "8.0.12",
     "jwt-decode": "2.2.0",
     "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#5466c9d08a2c262ebb5889e3bb0cbbe6f08dc0c3",