chore: bump webpack-cli from 3.3.12 to 4.3.1

Bumps [webpack-cli](https://github.com/webpack/webpack-cli) from 3.3.12 to 4.3.1.
- [Release notes](https://github.com/webpack/webpack-cli/releases)
- [Changelog](https://github.com/webpack/webpack-cli/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-cli/compare/v3.3.12...webpack-cli@4.3.1)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -72,7 +72,7 @@
     "react-dom": "16.13.1",
     "react-test-renderer": "16.13.1",
     "webpack": "4.44.2",
-    "webpack-cli": "3.3.12",
+    "webpack-cli": "4.3.1",
     "webpack-dev-server": "3.11.0"
   }
 }