Bump webpack-bundle-analyzer from 2.13.1 to 3.6.0 in /todo-list

Bumps [webpack-bundle-analyzer](https://github.com/webpack-contrib/webpack-bundle-analyzer) from 2.13.1 to 3.6.0.
- [Release notes](https://github.com/webpack-contrib/webpack-bundle-analyzer/releases)
- [Changelog](https://github.com/webpack-contrib/webpack-bundle-analyzer/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/webpack-bundle-analyzer@v2.13.1...v3.6.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

todo-list/package.json

@@ -70,7 +70,7 @@
     "vue-style-loader": "4.1.1",
     "vue-template-compiler": "2.5.17",
     "webpack": "3.12.0",
-    "webpack-bundle-analyzer": "2.13.1",
+    "webpack-bundle-analyzer": "3.6.0",
     "webpack-dev-middleware": "3.1.3",
     "webpack-hot-middleware": "2.22.3",
     "webpack-merge": "4.1.4"