the `Subscribe` method has a new overload *without* a handler parameter which returns a `ChannelMessageQueue`, which provides `async` ordered access to messsages)
- internal: the network architecture has moved to use `System.IO.Pipelines`; this has allowed us to simplify and unify a lot of the network code, and in particular
fix a lot of problems relating to how the library worked with TLS and/or .NETStandard
- added: ["streams"](https://redis.io/topics/streams-intro) support
- internal: most buffers internally now make use of pooled memory; `RedisValue` no longer pre-emptively allocates buffers; new APIs now exist to use pooled memory
directly (`RedisValue.CreateFrom(MemoryStream)` and `operator` support for `Memory<byte>` and `ReadOnlyMemory<byte>`; `IDatabase.StringGetLease[Async](...)`, `IDatabase.HashGetLease[Async](...)`, `Lease<byte>.AsStream()`)
- added: ["streams"](https://redis.io/topics/streams-intro) support (thanks to [ttingen](https://github.com/ttingen) for their contribution)
- various missing commands / overloads have been added
- a *lot* of general bugs and issues have been resolved
