Dependency free version

Hi, I've created a [dependency free version](https://ckeditor.com/docs/ckeditor5/latest/builds/guides/integration/configuration.html#adding-simple-standalone-features), to be used with a compiled version, e.g. `@ckeditor/ckeditor5-build-balloon` via `editorConfig.extraPlugins = [Emptyness]; `. Maybe this helps in any way...

Gist: https://gist.github.com/Basster/bc2145f0a0d711870e1c023a1cb7825a

