- removed: the `HighPriority` (queue-jumping) flag is now deprecated
- internal: most buffers internally now make use of pooled memory; `RedisValue` no longer pre-emptively allocates buffers
- internal: added new custom thread-pool for handling async continuations to avoid thread-pool starvation issues
- intenal: all IL has been removed internally; the library should now work on platforms that do not allow runtime-emit
- intenal: all IL generation has been removed; the library should now work on platforms that do not allow runtime-emit
- added: asynchronous operations now have full support for reporting timeouts
- added: new APIs now exist to work with pooled memory without allocations - `RedisValue.CreateFrom(MemoryStream)` and `operator` support for `Memory<byte>` and `ReadOnlyMemory<byte>`; and `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)
