Name change? (Request For Comments)

[alexeckermann]

Whilst the origin of the plugin was light hearted, quickly put together, and intentionally misspelt; it may be time to change the name going forwards. Looking towards production usage and adoption amongst the community.

Options:

1. ckeditor5-isempty being the most unambiguous. Only slight hitch being the plugin class having to be titlecase, Isempty, and looking weird.
2. ckeditor5-emptiness being the correct spelling. The plugin class then slightly altered to Emptiness.

An abrupt change will break builds. Hopefully, there can be a way to announce and ease this change in so that the inevitable build errors are descriptive to only need a few seconds worth of adjustments.

v0.2.0 will also amend some README language. To keep in mind that English slang and witticisms may not be helpful for developers where English is not their primary language.

[zadam]

Maybe just ckeditor5-placeholder? I'm aware that the plugin is actually more general (observing emptiness), but then I expect 99% uses cases will be just placeholder ...