Bump webpack-bundle-analyzer from 2.13.1 to 3.6.0

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/webpack-bundle-analyzer@v2.13.1...v3.6.0)

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

Author: dependabot[bot]

package.json

@@ -81,7 +81,7 @@
     "sw-precache-webpack-plugin": "0.11.4",
     "url-loader": "0.6.2",
     "webpack": "^3.8.1",
-    "webpack-bundle-analyzer": "^2.13.1",
+    "webpack-bundle-analyzer": "^3.6.0",
     "webpack-dev-server": "^2.9.4",
     "webpack-manifest-plugin": "1.3.2",
     "whatwg-fetch": "2.0.3",