Changes to Symbol Price Ticker

added the new optional query request parameter symbols

the response property code became required for the status 400

the response property msg became required for the status 400

the response property oneOf[#/components/schemas/priceTickerList]/items/price became required for the status 200

the response property oneOf[#/components/schemas/priceTickerList]/items/symbol became required for the status 200

the response property oneOf[#/components/schemas/priceTicker]/price became required for the status 200

the response property oneOf[#/components/schemas/priceTicker]/symbol became required for the status 200