Updates information for an existing department.
department.update
<"departmentName=<regexp>" | "departmentSerial=<value>">
[, "groupName=<new_value>"]
[, "company=<new_value>"]
[, "contactEmail=<new_value>"]
[, "contactPhone=<new_value>"]
[, "address1=<new_value>"]
[, "address2=<new_value>"]
[, "city=<new_value>"]
[, "state=<new_value>"]
[, "zip=<new_value>"]
[, "country=<new_value>"]