Bump @ckeditor/ckeditor5-dev-webpack-plugin from 8.0.5 to 8.0.6

Bumps [@ckeditor/ckeditor5-dev-webpack-plugin](https://github.com/ckeditor/ckeditor5-dev) from 8.0.5 to 8.0.6.
- [Release notes](https://github.com/ckeditor/ckeditor5-dev/releases)
- [Commits](https://github.com/ckeditor/ckeditor5-dev/compare/@ckeditor/ckeditor5-dev-webpack-plugin@8.0.5...@ckeditor/ckeditor5-dev-webpack-plugin@8.0.6

)

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