* Add more storage backends (https://github.com/Yipit/dredis/pull/23)
- New CLI arguments: `--backend` and `--backend-option`
- Add [LMDB](http://www.lmdb.tech/doc/) as a backend (performed better than LevelDB on Linux with the ext4 filesystem)
- Add memory backend (for tests & development)
* Make `KEYS` faster by looking at fewer backend keys (https://github.com/Yipit/dredis/pull/31)
* Add `DUMP` and `RESTORE` commands (https://github.com/Yipit/dredis/pull/27 and https://github.com/Yipit/dredis/pull/28)
- Based on the RDB version 7 implementation
* Add `SAVE` command and `--rdb` CLI option (https://github.com/Yipit/dredis/pull/32)
- `SAVE` creates an RDB dump (e.g., `dump_2019-06-21T15:55:09.rdb`)
- `--rdb` seeds dredis with a redis RDB file
- Only RDB version 7 and older are supported
* Add `--read-only` CLI option to accept read-only commands (https://github.com/Yipit/dredis/pull/33)