chore(deps) update js-utils

In preparation for Webpack 5.

package-lock.json

       }
     },
     "@jitsi/js-utils": {
-      "version": "1.0.6",
-      "resolved": "https://registry.npmjs.org/@jitsi/js-utils/-/js-utils-1.0.6.tgz",
-      "integrity": "sha512-XdLvgzhEhMsrzHBDgBydvWneGXSZ8ycg+dEK9bs2CLQhH5A9cHOOToDl9p/skts7WHQp4C8nkhsNzWC/cRvszQ==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/@jitsi/js-utils/-/js-utils-2.0.0.tgz",
+      "integrity": "sha512-Rk1JFGdXEJ5+eALVRTMohfn3pdMDQqlCJQEkCMLXKlCpEo+JhsOrB4KzlPo1rV9U8PnRfrf0j5N9uf/0C2a8Gw==",
       "requires": {
         "bowser": "2.7.0",
         "js-md5": "0.7.3"

package.json

     "@atlaskit/toggle": "12.0.3",
     "@atlaskit/tooltip": "17.1.2",
     "@hapi/bourne": "2.0.0",
-    "@jitsi/js-utils": "1.0.6",
+    "@jitsi/js-utils": "2.0.0",
     "@material-ui/core": "4.11.3",
     "@matrix-org/olm": "https://gitlab.matrix.org/api/v4/projects/27/packages/npm/@matrix-org/olm/-/@matrix-org/olm-3.2.3.tgz",
     "@microsoft/microsoft-graph-client": "1.1.0",

webpack.config.js

             // Transpile ES2015 (aka ES6) to ES5. Accept the JSX syntax by React
             // as well.
 
-            exclude: [
-                new RegExp(`${__dirname}/node_modules/(?!@jitsi/js-utils)`)
-            ],
             loader: 'babel-loader',
             options: {
                 // Avoid loading babel.config.js, since we only use it for React Native.