Bump webpack-bundle-analyzer from 2.13.1 to 3.6.1

Bumps [webpack-bundle-analyzer](https://github.com/webpack-contrib/webpack-bundle-analyzer) from 2.13.1 to 3.6.1.
- [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...v3.6.1)

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

Author: dependabot[bot]

package.json

@@ -122,7 +122,7 @@
     "vue-template-compiler": "^2.5.2",
     "vue-template-es2015-compiler": "^1.6.0",
     "webpack": "^2.2.1",
-    "webpack-bundle-analyzer": "^2.2.1",
+    "webpack-bundle-analyzer": "^3.6.1",
     "webpack-dev-middleware": "^1.10.0",
     "webpack-hot-middleware": "^2.16.1",
     "webpack-merge": "^2.6.1"