SG-37548 Add payload optimization on update method

[carlos-villavicencio-adsk]

Summary

This is a follow up work from #360 in this case including support for updatemethod.

Affected methods

• update

Detailed Description

The change should transform calls like:

sg.update( "Asset", 123,{"name": "Some name", "project":{"created_at": datetime.datetime(2015, 12, 16, 11, 2, 10, tzinfo), "id": 72, "name": "Demo: Game", "type": "Project", }, }, )

as if the following had been called:

sg.update('Asset', 123,{'name': 'Some name', 'project' :{'id': 72, 'type': 'Project'}})

The base branch was changed.