Link Previews block and rich_text supported in response

The public API now supports returning link_preview blocks and mentions found in rich_text! Previously these blocks had type unsupported and mentions were skipped in rich_text. Note: link_previews cannot be created via the API, only returned in responses.

See the documentation in blocks and rich_text for more information.

{
  "type": "link_preview",
  //...other keys excluded
  "link_preview": {
    "url": "https://github.com/example/example-repo/pull/1234"
  }
}