Add support for Comments API

[KoditkarVedant]

Notion has launched a brand new set of APIs for interacting with Notion comments. This includes the ability to:

• Read comments from a page or block.
• Add a comment to a page.
• Add a comment to an existing discussion thread on a block.

For more information, check out the new guide or dive straight into the API reference.

Notion changelog: https://developers.notion.com/changelog/comments-api

[KoditkarVedant]

Available as part of pre-release 4.0.0-preview-2.8.29.2022

[KoditkarVedant]

4.0.0 Released