Update raw-loader requirement in /{{cookiecutter.app_name}} (#460)

Updates the requirements on [raw-loader](https://github.com/webpack-contrib/raw-loader) to permit the latest version.
- [Release notes](https://github.com/webpack-contrib/raw-loader/releases)
- [Changelog](https://github.com/webpack-contrib/raw-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/raw-loader/commits

)

Signed-off-by: dependabot[bot] <support@dependabot.com>