Show warnings on test tree

[livni]

Hi vscode-python community,

I just started to use pytest in VSCode env and I find the Testing tree on the left super useful.

I wanted to point to a feature request that would allow seeing both errors and warnings on the tree, not only errors. Warnings have been a collected signal by pytest since 3.1 and having it on the tree would be, at least for me, super useful. If you think so too, feel free to upvote the feature request :)

Thanks!

[brettcannon]

Because this is covered in a feature request, I'm going to lock this issue to minimize notifications for folks. Obviously if people like the idea then please go upvote the issue.