chore(deps): bump ejs and webpack-bundle-analyzer

Removes [ejs](https://github.com/mde/ejs). It's no longer used after updating ancestor dependency [webpack-bundle-analyzer](https://github.com/webpack-contrib/webpack-bundle-analyzer). These dependencies need to be updated together.


Removes `ejs`

Updates `webpack-bundle-analyzer` from 3.5.2 to 4.10.2
- [Changelog](https://github.com/webpack-contrib/webpack-bundle-analyzer/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/webpack-bundle-analyzer@v3.5.2...v4.10.2)

---
updated-dependencies:
- dependency-name: ejs
  dependency-type: indirect
- dependency-name: webpack-bundle-analyzer
  dependency-type: direct:development
...

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

package.json

@@ -51,7 +51,7 @@
     "sinon": "^9.0.0",
     "testem": "^3.0.0",
     "webpack": "^4.41.0",
-    "webpack-bundle-analyzer": "^3.5.2",
+    "webpack-bundle-analyzer": "^4.10.2",
     "webpack-cli": "^3.3.9",
     "yamljs": "^0.3.0"
   },