Loading the block-editor script on the widgets block editor produces a
`_doing_it_wrong()` notice because the `wp-editor` script should not be
loaded for the widgets block editor, but it is a dependency for this plugin's
block-editor script.

Fixes #22

Closes https://github.com/ethitter/WP-Revisions-Control/pull/5.

Requires manual configuration, due to https://github.com/stephenharris/wp-readme-to-markdown/issues/14.