Petabridge.Cmd.Cluster 0.8.0-rc1

Petabridge.Cmd v0.8.0-rc1 builds on top of the work of Petabridge.Cmd v0.7.1, but aimed at supporting [the Akka.NET v1.4.1-rc1 implementation of Akka.NET](https://getakka.net/community/whats-new/akkadotnet-v1.4.html). --- Petabridge.Cmd 0.7.1 introduces some minor bug fixes and updates prior to the release of Akka.NET v1.4.0: - Fixed bug where all addresses in Akka.Cluster.Sharding `region-stats` appeared to be the address of the local node running the report; - Upgraded to Akka.NET 1.3.17; - Added integration test to verify Serilog compatibility for logging steps. In order for [Akka.Logger.Serilog](https://github.com/akkadotnet/Akka.Logger.Serilog) to work with `Petabridge.Cmd.Host`, the Akka.NET Testkit, [Phobos](https://phobos.petabridge.com/), _or any other component_ you must always call the Serilog logging adapter from your actor code like this in order to use Serilog semantic logging: ```csharp var log = Context.GetLogger<SerilogLoggingAdapter>(); // correct log.Info("My boss makes me use {semantic} logging", "semantic"); // serilog semantic logging format ``` If you do the following you will get string formatting errors everywhere: ```csharp var log = Context.GetLogger(); // INCORRECT log.Info("My boss makes me use {semantic} logging", "semantic"); // will throw string formatting errors everywhere ```