Bump webpack-cli from 3.3.12 to 4.7.0

Bumps [webpack-cli](https://github.com/webpack/webpack-cli) from 3.3.12 to 4.7.0.
- [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@4.7.0)

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

Author: dependabot-preview[bot]

package.json

@@ -45,7 +45,7 @@
     "typescript": "^3.9.9",
     "webpack": "^4.46.0",
     "webpack-babel-multi-target-plugin": "^2.5.0",
-    "webpack-cli": "^3.3.12",
+    "webpack-cli": "^4.7.0",
     "webpack-dev-server": "^3.11.2"
   }
 }