Changes to Get Option Contracts

added the optional property allOf[subschema #2]/data/items/underlying_instrument_type to the response with the 200 status

for the query request parameter underlying_instrument_id, the minLength was increased from 0 to 1

added the new optional query request parameter contract_ids

added the new optional query request parameter is_settle_on_open

added the new optional query request parameter root

query request parameter underlier was deprecated

for the query request parameter underlying_instrument_id, the type was generalized from no type to string

added the optional property allOf[subschema #2]/data/items/is_settle_on_open to the response with the 200 status

added the optional property allOf[subschema #2]/data/items/last_trade_cutoff to the response with the 200 status

added the optional property allOf[subschema #2]/data/items/tick_rules to the response with the 200 status

added the required property allOf[subschema #2]/data/items/is_tradable to the response with the 200 status

removed the required property allOf[subschema #2]/data/items/is_tradable from the response with the 200 status

added the required property allOf[subschema #2]/data/items/is_tradable to the response with the 200 status

removed the required property allOf[subschema #2]/data/items/is_restricted from the response with the 200 status