Add additional polyfills for Stimulus and Turbo

app/frontend/application.js

@@ -4,6 +4,8 @@
 // that code so it'll be compiled.
 
 // Polyfills for IE
+import "@webcomponents/webcomponentsjs"
+import "core-js/stable"
 import "regenerator-runtime/runtime"
 import "@stimulus/polyfills"
 import "custom-event-polyfill"

package.json

@@ -13,6 +13,7 @@
     "@hotwired/turbo": "^7.1.0",
     "@hotwired/turbo-rails": "^7.1.0",
     "@stimulus/polyfills": "^2.0.0",
+    "@webcomponents/webcomponentsjs": "^2.6.0",
     "accessible-autocomplete": "^2.0.3",
     "babel-loader": "^8.2.3",
     "babel-plugin-macros": "^3.1.0",

yarn.lock

@@ -1150,6 +1150,11 @@
     "@webassemblyjs/ast" "1.11.1"
     "@xtuc/long" "4.2.2"
 
+"@webcomponents/webcomponentsjs@^2.6.0":
+  version "2.6.0"
+  resolved "https://registry.yarnpkg.com/@webcomponents/webcomponentsjs/-/webcomponentsjs-2.6.0.tgz#7d1674c40bddf0c6dd974c44ffd34512fe7274ff"
+  integrity sha512-Moog+Smx3ORTbWwuPqoclr+uvfLnciVd6wdCaVscHPrxbmQ/IJKm3wbB7hpzJtXWjAq2l/6QMlO85aZiOdtv5Q==
+
 "@webpack-cli/configtest@^1.1.1":
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/@webpack-cli/configtest/-/configtest-1.1.1.tgz#9f53b1b7946a6efc2a749095a4f450e2932e8356"