Bump webpack-cli from 3.3.11 to 3.3.12

Bumps [webpack-cli](https://github.com/webpack/webpack-cli) from 3.3.11 to 3.3.12.
- [Release notes](https://github.com/webpack/webpack-cli/releases)
- [Changelog](https://github.com/webpack/webpack-cli/blob/v3.3.12/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-cli/compare/v3.3.11...v3.3.12)

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

package.json

@@ -65,7 +65,7 @@
     "typescript": "3.9",
     "utf8": "^3.0.0",
     "webpack": "^4.43.0",
-    "webpack-cli": "^3.3.11",
+    "webpack-cli": "^3.3.12",
     "ws": "^7.3.0",
     "xterm-benchmark": "^0.1.3"
   }