v5.2.1

Aleksandr Arkhipov

@a.arkhipov

02e3c35e · Merge branch 'feature/85ztvqpu3_ckeditor_detail_plugin' into '5.x' · Oct 11, 2023

* 5.2.1
  * Added Detail plugin for CKEditor 4
  * README.md: Declared usage of CKEditor 4