Set corejs version

frontend/gulp/webpack.js

@@ -100,6 +100,7 @@ const config = {
                     loose: true,
                     debug: false,
                     useBuiltIns: 'entry',
+                    corejs: 3,
                     targets: browsers
                   }
                 ]
@@ -119,8 +120,9 @@ const config = {
             loader: 'css-loader',
             options: {
               importLoaders: 1,
-              localIdentName: '[name]/[local]/[hash:base64:5]',
-              modules: true
+              modules: {
+                localIdentName: '[name]/[local]/[hash:base64:5]'
+              }
             }
           },
           {

package.json

@@ -43,6 +43,7 @@
     "classnames": "2.2.6",
     "clipboard": "2.0.4",
     "connected-react-router": "6.3.1",
+    "core-js": "3",
     "create-react-class": "15.6.3",
     "css-loader": "3.0.0",
     "del": "4.0.0",

yarn.lock

@@ -2496,6 +2496,11 @@ core-js-pure@3.1.4:
   resolved "https://registry.yarnpkg.com/core-js-pure/-/core-js-pure-3.1.4.tgz#5fa17dc77002a169a3566cc48dc774d2e13e3769"
   integrity sha512-uJ4Z7iPNwiu1foygbcZYJsJs1jiXrTTCvxfLDXNhI/I+NHbSIEyr548y4fcsCEyWY0XgfAG/qqaunJ1SThHenA==
 
+core-js@3:
+  version "3.1.4"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.1.4.tgz#3a2837fc48e582e1ae25907afcd6cf03b0cc7a07"
+  integrity sha512-YNZN8lt82XIMLnLirj9MhKDFZHalwzzrL9YLt6eb0T5D0EDl4IQ90IGkua8mHbnxNrkj1d8hbdizMc0Qmg1WnQ==
+
 core-js@^1.0.0:
   version "1.2.7"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-1.2.7.tgz#652294c14651db28fa93bd2d5ff2983a4f08c636"