Add get_block_range

Implement get_block_range as an instance method for Hive::BlockApi and use this method for Hive::Stream by default instead of json-rpc batch. Allow developers to pick which method to use.

AC

• Add block_api.get_block_range to Hive::BlockApi instance
• Use block_api.get_block_range for streaming (by default)
• Use account_history_api.enum_virtual_ops for streaming virtual operations (if supported)

mentioned in commit 94142bc9

marked the checklist item Add get_block_range to Hive::BlockApi instance as completed

marked the checklist item Use get_block_range for streaming (by default) as completed

changed the description

mentioned in merge request !3 (merged)

mentioned in commit b846e5f1

closed with merge request !3 (merged)