build: use shared browserslist config

Author: adamstankiewicz

.github/workflows/ci.yml

@@ -34,7 +34,5 @@ jobs:
       run: npm run build
     - name: i18n_extract
       run: npm run i18n_extract
-    - name: is-es5
-      run: npm run is-es5
     - name: Coverage
       uses: codecov/codecov-action@v2

package-lock.json

@@ -7,13 +7,11 @@
     "url": "git+https://github.com/edx/frontend-template-application.git"
   },
   "browserslist": [
-    "last 2 versions",
-    "ie 11"
+    "extends @edx/browserslist-config"
   ],
   "scripts": {
     "build": "fedx-scripts webpack",
     "i18n_extract": "BABEL_ENV=i18n fedx-scripts babel src --quiet > /dev/null",
-    "is-es5": "es-check es5 ./dist/*.js",
     "lint": "fedx-scripts eslint --ext .js --ext .jsx .",
     "lint:fix": "fedx-scripts eslint --fix --ext .js --ext .jsx .",
     "snapshot": "fedx-scripts jest --updateSnapshot",
@@ -56,6 +54,7 @@
     "regenerator-runtime": "0.13.9"
   },
   "devDependencies": {
+    "@edx/browserslist-config": "1.0.0",
     "@edx/frontend-build": "9.2.2",
     "codecov": "3.8.3",
     "es-check": "5.2.4",