Bump webpack, terser-webpack-plugin and webpack-cli

Bumps [webpack](https://github.com/webpack/webpack), [terser-webpack-plugin](https://github.com/webpack-contrib/terser-webpack-plugin) and [webpack-cli](https://github.com/webpack/webpack-cli). These dependencies needed to be updated together.

Updates `webpack` from 4.47.0 to 5.94.0
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v4.47.0...v5.94.0)

Updates `terser-webpack-plugin` from 1.4.5 to 5.3.10
- [Release notes](https://github.com/webpack-contrib/terser-webpack-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/terser-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/terser-webpack-plugin@v1.4.5...v5.3.10)

Updates `webpack-cli` from 3.3.12 to 5.1.4
- [Release notes](https://github.com/webpack/webpack-cli/releases)
- [Changelog](https://github.com/webpack/webpack-cli/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-cli/compare/v3.3.12...webpack-cli@5.1.4)

---
updated-dependencies:
- dependency-name: webpack
  dependency-type: direct:development
- dependency-name: terser-webpack-plugin
  dependency-type: direct:development
- dependency-name: webpack-cli
  dependency-type: direct:development
...

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