Changes to POST /v2/workTimes/changeRequests

the request property changes/items/time_since became required

the request property changes/items/time_until became required

the request property changes/items/type became required

removed the required property data from the response with the 200 status

added the required property approved_immediately to the response with the 200 status

added the required property change_request to the response with the 200 status

added the required property replaced_change_request to the response with the 200 status