chore(deps-dev): bump webpack-cli from 3.3.6 to 4.7.2

Bumps [webpack-cli](https://github.com/webpack/webpack-cli) from 3.3.6 to 4.7.2.
- [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/v3.3.6...webpack-cli@4.7.2)

---
updated-dependencies:
- dependency-name: webpack-cli
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

packages/api/package.json

@@ -27,7 +27,7 @@
     "babel-loader": "^8.0.6",
     "reload-server-webpack-plugin": "^1.0.1",
     "webpack": "4.46.0",
-    "webpack-cli": "3.3.6",
+    "webpack-cli": "4.7.2",
     "webpack-node-externals": "3.0.0",
     "webpack-plugin-serve": "1.4.1"
   },

packages/server/package.json

@@ -31,7 +31,7 @@
     "babel-loader": "^8.0.6",
     "reload-server-webpack-plugin": "^1.0.1",
     "webpack": "4.46.0",
-    "webpack-cli": "3.3.6",
+    "webpack-cli": "4.7.2",
     "webpack-node-externals": "3.0.0",
     "webpack-plugin-serve": "1.4.1"
   },