Rename DraftEditorBlock to EditorBlock (#2002)
Rename DraftEditorBlock to EditorBlock (#2002)

Summary:
**Summary**

The `DraftEditorBlock` component is exposed to the public API as `EditorBlock`, while the [documentation](https://draftjs.org/docs/advanced-topics-block-components) still mentions `DraftEditorBlock`.
https://github.com/facebook/draft-js/blob/b4183b1519edcd075325adae0cb208551dc80f50/src/Draft.js#L45
Pull Request resolved: https://github.com/facebook/draft-js/pull/2002

Differential Revision: D15239547

Pulled By: claudiopro

fbshipit-source-id: 43556827d1bc571e98b528562c88038f195534c7

facebook/draft-js