Missing documentation for update of file metadata or properties with ListItemAllFields end point

[adelinor]

Hi,

Contrary to the issue #25 where the implementation for the ListItemAllFields endpoint is missing but well documented and is therefore trivial to implement; updating properties of a file is not documented at all.

The ListItemAllFields endpoint is listed as read only method in the Files section of the SharePoint REST API documentation. The Lists section does not specifically mention ListItemAllFields.

The following discussion is helpful to get started: https://sharepoint.stackexchange.com/questions/160779/sharepoint-rest-api-c-update-document-metadata

Regards