Notion-sdk

Add support for page icons, page covers, new URL based block types, and file page properties.

More details in the [changelog](https://developers.notion.com/changelog/page-icons-cover-images-new-block-types-and-improved-page-file-properties).

Changes to reflect backwards incompatible Notion-Version 2021-08-16 [changes](https://developers.notion.com/changelog/notion-version-2021-08-16)

Feature:
- Add Update of existing database endpoint support
https://developers.notion.com/changelog/update-existing-databases-with-patch-v1databases

Fixes:
- Replace default version header
- Add body parameters to endpoint create database

Fixes

- Add missing database property type `Formula`
- Add missing Rollup Function `percent_checked`

- Add retrieve and update blocks with GET and PATCH /v1/blocks/:id

> You can now retrieve and update block objects with the Notion API! The PATCH endpoint currently supports updating paragraph, heading_1, heading_2, heading_3, bulleted_list_item, numbered_list_item, toggle and to_do blocks.
More information about this new feature available here:
https://developers.notion.com/changelog/retrieve-and-update-blocks-with-get-and-patch-v1blocksid

Add support for page icons, page covers, new URL based block types, and file page properties.

More details in the [changelog](https://developers.notion.com/changelog/page-icons-cover-images-new-block-types-and-improved-page-file-properties).