Todoist API v8 deprecated

[ihoru]

Sending any message to the bot results with no response.

any_text: This endpoint is deprecated.

If you're reading this on a browser, there's a good chance you can change
the v8 part on the URL to v9 and get away with it. ;)

If you're using the API directly, please update your use case to rely
on the new API endpoints, available under /sync/v9/ or /rest/v2/ prefixes.

For more details, please see documentation at
https://developer.todoist.com/guides/#our-apis