Bump webpack-cli from 3.3.7 to 3.3.8

Bumps [webpack-cli](https://github.com/webpack/webpack-cli) from 3.3.7 to 3.3.8.
- [Release notes](https://github.com/webpack/webpack-cli/releases)
- [Changelog](https://github.com/webpack/webpack-cli/blob/v3.3.8/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-cli/compare/v3.3.7...v3.3.8)

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

package.json

@@ -83,7 +83,7 @@
 		"vue-style-loader": "^4.1.1",
 		"vue-template-compiler": "^2.6.10",
 		"webpack": "^4.39.3",
-		"webpack-cli": "^3.3.7",
+		"webpack-cli": "^3.3.8",
 		"webpack-merge": "^4.2.2"
 	},
 	"jest": {