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 3.8.0 to 4.6.1
- [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/webpack-bundle-analyzer@v3.8.0...v4.6.1)

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

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

Author: dependabot[bot]

package-lock.json

@@ -79,7 +79,7 @@
     "ts-node": "^8.6.2",
     "tslint": "~6.1.0",
     "typescript": "^4.0.5",
-    "webpack-bundle-analyzer": "^3.8.0",
+    "webpack-bundle-analyzer": "^4.6.1",
     "yargs": "^14.2.0"
   },
   "main": "karma.conf.js"