Feature Request: Add support for CostRate attribute in TimeActivity object

[miles-rf]

Apologies if this is an inappropriate avenue to make this request.

The Quickbooks API documentation appears to indicate that the TimeActivity object has an optional variable "CostRate" which is readable and writable. However, the TimeAcitivity class of python-quickbooks does not appear to define a CostRate attribute, and attempting to save an edited TimeActivity to the QB server does not result in updated values for the time activity on the server.

It would be great if python-quickbooks supported reading and writing the CostRate variable from and to the quickbooks server.