[Dependency] Bump webpack-dev-middleware, karma-webpack and webpack-dev-server

Removes [webpack-dev-middleware](https://github.com/webpack/webpack-dev-middleware). It's no longer used after updating ancestor dependencies [webpack-dev-middleware](https://github.com/webpack/webpack-dev-middleware), [karma-webpack](https://github.com/webpack-contrib/karma-webpack) and [webpack-dev-server](https://github.com/webpack/webpack-dev-server). These dependencies need to be updated together.


Removes `webpack-dev-middleware`

Updates `karma-webpack` from 4.0.2 to 5.0.1
- [Release notes](https://github.com/webpack-contrib/karma-webpack/releases)
- [Changelog](https://github.com/codymikol/karma-webpack/blob/master/CHANGELOG.md)
- [Commits](codymikol/karma-webpack@v4.0.2...v5.0.1)

Updates `webpack-dev-server` from 3.11.2 to 5.0.4
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md)
- [Commits](webpack/webpack-dev-server@v3.11.2...v5.0.4)

---
updated-dependencies:
- dependency-name: webpack-dev-middleware
  dependency-type: indirect
- dependency-name: karma-webpack
  dependency-type: direct:development
- dependency-name: webpack-dev-server
  dependency-type: direct:development
...

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

Author: dependabot[bot]