Bump webpack-cli from 3.3.11 to 4.2.0 in /src/packages/excalidraw (#2571)

Bumps [webpack-cli](https://github.com/webpack/webpack-cli) from 3.3.11 to 4.2.0.
- [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/v3.3.11...webpack-cli@4.2.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Aakansha Doshi <aakansha1216@gmail.com>

src/packages/excalidraw/package.json

@@ -60,7 +60,7 @@
     "ts-loader": "7.0.0",
     "webpack": "4.42.0",
     "webpack-bundle-analyzer": "3.9.0",
-    "webpack-cli": "3.3.11"
+    "webpack-cli": "4.2.0"
   },
   "bugs": "https://github.com/excalidraw/excalidraw/issues",
   "repository": "https://github.com/excalidraw/excalidraw",