Bump @rails/webpacker from 5.2.1 to 5.3.0 (#13545)

Bumps [@rails/webpacker](https://github.com/rails/webpacker) from 5.2.1 to 5.3.0.
- [Release notes](https://github.com/rails/webpacker/releases)
- [Changelog](https://github.com/rails/webpacker/blob/v5.3.0/CHANGELOG.md)
- [Commits](https://github.com/rails/webpacker/compare/v5.2.1...v5.3.0)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -151,7 +151,7 @@
     "@babel/preset-env": "^7.13.15",
     "@github/clipboard-copy-element": "^1.1.2",
     "@honeybadger-io/webpack": "^1.2.0",
-    "@rails/webpacker": "5.2.1",
+    "@rails/webpacker": "5.3.0",
     "@reach/combobox": "^0.15.0",
     "ahoy.js": "^0.3.8",
     "autoprefixer": "^10.2.5",