Bump webpack-dev-middleware and karma-webpack

Bumps [webpack-dev-middleware](https://github.com/webpack/webpack-dev-middleware) to 5.3.4 and updates ancestor dependency [karma-webpack](https://github.com/webpack-contrib/karma-webpack). These dependencies need to be updated together.


Updates `webpack-dev-middleware` from 5.3.3 to 5.3.4
- [Release notes](https://github.com/webpack/webpack-dev-middleware/releases)
- [Changelog](https://github.com/webpack/webpack-dev-middleware/blob/v5.3.4/CHANGELOG.md)
- [Commits](webpack/webpack-dev-middleware@v5.3.3...v5.3.4)

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)

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

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