Bump ejs, nightwatch and webpack-bundle-analyzer

Bumps [ejs](https://github.com/mde/ejs), [nightwatch](https://github.com/nightwatchjs/nightwatch) and [webpack-bundle-analyzer](https://github.com/webpack-contrib/webpack-bundle-analyzer). These dependencies needed to be updated together.

Updates `ejs` from 2.5.7 to 3.1.8
- [Release notes](https://github.com/mde/ejs/releases)
- [Changelog](https://github.com/mde/ejs/blob/main/CHANGELOG.md)
- [Commits](mde/ejs@v2.5.7...v3.1.8)

Updates `nightwatch` from 0.9.21 to 2.3.4
- [Release notes](https://github.com/nightwatchjs/nightwatch/releases)
- [Commits](https://github.com/nightwatchjs/nightwatch/commits/v2.3.4)

Updates `webpack-bundle-analyzer` from 2.13.1 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@v2.13.1...v4.6.1)

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

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Author: dependabot[bot]