The package was moved to the main repository.
This package implements the headings feature for CKEditor 5.
See the @ckeditor/ckeditor5-heading package page in CKEditor 5 documentation.
Licensed under the terms of GNU General Public License Version 2 or later. For full details about the license, please check the LICENSE.md file or https://ckeditor.com/legal/ckeditor-oss-license.