Bump webpack-bundle-analyzer from 2.9.0 to 3.6.0 in /vue-material

Bumps [webpack-bundle-analyzer](https://github.com/webpack-contrib/webpack-bundle-analyzer) from 2.9.0 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@v2.9.0...v3.6.0)

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

Author: dependabot[bot]

vue-material/package.json

@@ -77,7 +77,7 @@
     "vue-style-loader": "3.0.2",
     "vue-template-compiler": "2.4.3",
     "webpack": "3.5.6",
-    "webpack-bundle-analyzer": "2.9.0",
+    "webpack-bundle-analyzer": "3.6.0",
     "webpack-dev-middleware": "1.12.0",
     "webpack-hot-middleware": "2.19.1",
     "webpack-merge": "4.1.0"