upload_session/append

[upload_session/append](https://www.dropbox.com/developers/documentation/http/documentation#files-upload_session-append) scope: `files.content.write` Append more data to an upload session. When the parameter close is set, this call will close the session. A single request should not upload more than 150 MB. The maximum size of a file one can upload to an upload session is 350 GB. Calls to this endpoint will count as data transport calls for any Dropbox Business teams with a limit on the num...