Bump webpack-cli from 3.3.6 to 3.3.7

Bumps [webpack-cli](https://github.com/webpack/webpack-cli) from 3.3.6 to 3.3.7.
- [Release notes](https://github.com/webpack/webpack-cli/releases)
- [Changelog](https://github.com/webpack/webpack-cli/blob/v3.3.7/CHANGELOG.md)
- [Commits](webpack/webpack-cli@v3.3.6...v3.3.7)

Signed-off-by: dependabot-preview[bot] <[email protected]>
Signed-off-by: npmbuildbot[bot] <npmbuildbot[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

package-lock.json

@@ -35,7 +35,7 @@
     "vue-loader": "^15.7.1",
     "vue-template-compiler": "^2.6.10",
     "webpack": "^4.38.0",
-    "webpack-cli": "^3.3.6",
+    "webpack-cli": "^3.3.7",
     "webpack-merge": "^4.2.2"
   }
 }