Changes to Upsert invoice

added the new optional request property total

added the optional property data/total to the response with the 201 status

added the new optional request property ending_balance

added the new optional request property starting_balance

added the required property data/ending_balance to the response with the 201 status

added the required property data/starting_balance to the response with the 201 status

added the new metronome enum value to the data/provider_type response property for the response status 201