4.10.0
Add 1.20.6 to .5 version We technically don't know whether that will stay true, but might as well now to prevent confusion, as it wouldn't have any consequences if it did change
Small refactors around ProtocolPipeline and concurrent collections Make concurrency handling in ProtocolPipelineImpl more defensive, as generally the pipeline is expected to never be called from multiple threads. The only case to look out for is pipeline additions during protocol transformation in a base protocol