Changes to List blocks

the response property _status/messages/items/data became nullable for the status 400

the response property _status/messages/items/detail became nullable for the status 400

the response property blocks/items/gas_used became nullable for the status 200

the response property blocks/items/hapi_version became nullable for the status 200

the response property blocks/items/logs_bloom became nullable for the status 200

the response property blocks/items/size became nullable for the status 200

the response property blocks/items/timestamp/to/allOf[#/components/schemas/TimestampNullable] became nullable for the status 200

the response property links/next became nullable for the status 200