CLDC-1057: add core-js polyfills

.browserslistrc

@@ -1 +1,3 @@
 defaults
+ie 11
+ie 10

app/webpacker/packs/application.js

@@ -2,7 +2,7 @@
 // present in this directory. You're encouraged to place your actual application logic in
 // a relevant structure within app/javascript and only use these pack files to reference
 // that code so it'll be compiled.
-require("@babel/polyfill")
+require("core-js");
 require.context('govuk-frontend/govuk/assets')
 
 import '../styles/application.scss'

package.json

@@ -6,7 +6,6 @@
   },
   "dependencies": {
     "@activeadmin/activeadmin": "^2.9.0",
-    "@babel/polyfill": "^7.12.1",
     "@hotwired/stimulus": "^3.0.0",
     "@hotwired/stimulus-webpack-helpers": "^1.0.1",
     "@hotwired/turbo": "^7.1.0",
@@ -17,6 +16,7 @@
     "accessible-autocomplete": "^2.0.3",
     "chart.js": "^3.6.0",
     "chartkick": "^4.1.0",
+    "core-js": "3",
     "govuk-frontend": "^4.0.1",
     "stimulus": "^3.0.0",
     "webpack": "^4.46.0",

yarn.lock

@@ -785,14 +785,6 @@
     "@babel/helper-create-regexp-features-plugin" "^7.16.7"
     "@babel/helper-plugin-utils" "^7.16.7"
 
-"@babel/polyfill@^7.12.1":
-  version "7.12.1"
-  resolved "https://registry.yarnpkg.com/@babel/polyfill/-/polyfill-7.12.1.tgz#1f2d6371d1261bbd961f3c5d5909150e12d0bd96"
-  integrity sha512-X0pi0V6gxLi6lFZpGmeNa4zxtwEmCs42isWLNjZZDE0Y8yVfgu0T2OAHlzBbdYlqbW/YXVvoBHpATEM+goCj8g==
-  dependencies:
-    core-js "^2.6.5"
-    regenerator-runtime "^0.13.4"
-
 "@babel/preset-env@^7.15.0":
   version "7.16.11"
   resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.16.11.tgz#5dd88fd885fae36f88fd7c8342475c9f0abe2982"
@@ -2315,12 +2307,7 @@ core-js-compat@^3.20.2, core-js-compat@^3.21.0:
     browserslist "^4.19.1"
     semver "7.0.0"
 
-core-js@^2.6.5:
-  version "2.6.12"
-  resolved "https://registry.npmjs.org/core-js/-/core-js-2.6.12.tgz"
-  integrity sha512-Kb2wC0fvsWfQrgk8HU5lW6U/Lcs8+9aaYcy4ZFc6DDlo4nZ7n70dEgE5rtR0oG6ufKDUnrwfWL1mXR5ljDatrQ==
-
-core-js@^3.16.2:
+core-js@3, core-js@^3.16.2:
   version "3.21.1"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.21.1.tgz#f2e0ddc1fc43da6f904706e8e955bc19d06a0d94"
   integrity sha512-FRq5b/VMrWlrmCzwRrpDYNxyHP9BcAZC+xHJaqTgIE5091ZV1NTmyh0sGOg5XqpnHvR0svdy0sv1gWA1zmhxig==