Optional dependency

[andre2007]

In the forum the question was raised, why dub is downloading unit-threaded, although it is marked optional in dshould.

https://forum.dlang.org/thread/cfzhlpynvtcvctsqxiwo@forum.dlang.org

This is actually caused by the fact, that unit-threaded is also a dependency in the unittest configuration. Here it isn't marked as optional.

Dub will download all mandatory dependencies from all configurations, independent which configuration is actually used.

Just want to make you aware of this behavior.