bugfix: Forward standard output to logger

[tgodzik]

Causes VirtusLab/scala-cli#1023

[tgodzik]

The biggest issue with this approach is that we might be getting wrong compiler messages (from concurrent compilation) if compiling a couple of things at the same time. On the other hand, it would really be a rare scenario where we would get printlns from compiler at the same time for different clients as normal compilation does not do it. This should not cause real issues especially that nowadays Bloop really just works with one.

[adpi2]

I don't really like it but I guess we don't have a choice. It would be nice if the compiler uses the logger to print those trees.

[tgodzik]

I don't really like it but I guess we don't have a choice. It would be nice if the compiler uses the logger to print those trees.

Good news is that with the recent changes this is only an issue if the same user compiles with additional print options two projects at the same time. Which should be super rare.

[tgodzik]

I will merge this after 2.0.0 just to be on the safe side