Release does not have RCLdotnet.Shutdown

[davidrigie]

It looks like a "Shutdown" command was added to the RCLdotnet class here by @ooeygui :

Function in question

PR
ms-iot/ros2_dotnet#9

however, the compiled DLL included in this release appears to be missing this function which I believe is needed to properly cleanup the node resources in a Unity app. Is a more recent release available somewhere with this functionality? I'm not sure why the release doesn't have it since it did seem to be merged into the ros2_dotnet repo just before the latest release of this repo.