Replace an upload (upload versions)

[rgr78]

Using the BC3 API, we cannot update (replace) a file we uploaded. We can only modify the basename and description. https://github.com/basecamp/bc3-api/blob/master/sections/uploads.md#update-an-upload

For our project, we need to be able to replace the files we uploaded via API, similar to what we can do using the website.