v4.0.0

BREAKING CHANGES

• Upgraded the minimal versions of Node.js to 14.0.0 due to the end of LTS.

Bug fixes

• Use async/await in CKEditorContext#_destroyContext() to handle context destruction properly. Closes #283. (commit)

Other changes

• Updated the required version of Node.js to 14. See ckeditor/ckeditor5#10972. (commit)