fix: Use browserslist-config

We were installing browserslist-config but not declaring it.  This had
the effect that webpack - and likely others - were not using it.

package.json

@@ -6,6 +6,9 @@
     "type": "git",
     "url": "git+https://github.com/edx/frontend-app-ora-grading.git"
   },
+  "browserslist": [
+    "extends @edx/browserslist-config"
+  ],
   "scripts": {
     "build": "fedx-scripts webpack",
     "i18n_extract": "fedx-scripts formatjs extract",
@@ -35,6 +38,7 @@
     "@openedx/frontend-slot-footer": "^1.0.2",
     "@openedx/paragon": "21.11.3",
     "@redux-beacon/segment": "^1.1.0",
+    "@redux-devtools/extension": "3.0.0",
     "@reduxjs/toolkit": "^1.6.1",
     "@testing-library/user-event": "^14.0.0",
     "@zip.js/zip.js": "^2.4.6",
@@ -63,7 +67,6 @@
     "react-router-redux": "^5.0.0-alpha.9",
     "redux": "4.2.1",
     "redux-beacon": "^2.1.0",
-    "@redux-devtools/extension": "3.0.0",
     "redux-logger": "3.0.6",
     "redux-thunk": "2.4.2",
     "regenerator-runtime": "^0.14.0",
@@ -72,7 +75,7 @@
     "whatwg-fetch": "^3.6.2"
   },
   "devDependencies": {
-    "@edx/browserslist-config": "^1.2.0",
+    "@edx/browserslist-config": "^1.3.0",
     "@edx/react-unit-test-utils": "3.0.0",
     "@edx/reactifex": "^2.1.1",
     "@openedx/frontend-build": "14.0.3",