Changes to List Customer Contracts Developer

the response property items/end_date became optional for the status 200

the response property items/number_of_months became optional for the status 200

the response property items/start_date became optional for the status 200

response property items/end_date list-of-types was widened by adding types null to media type application/json of response 200

response property items/number_of_months list-of-types was widened by adding types null to media type application/json of response 200

response property items/start_date list-of-types was widened by adding types null to media type application/json of response 200

added the optional property items/billing_start_pending to the response with the 200 status