build: update webpack-cli requirement to ^3.0.1 (#2579)

Updates the requirements on [webpack-cli](https://github.com/webpack/webpack-cli) to permit the latest version.
- [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/commits/v3.0.1)

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

package.json

@@ -55,7 +55,7 @@
     "json-filter-loader": "^1.0.0",
     "uglifyjs-webpack-plugin": "^1.1.8",
     "webpack": "^4.5.0",
-    "webpack-cli": "^2.0.14"
+    "webpack-cli": "^3.0.1"
   },
   "engines": {
     "node": ">=8.0.0"