Yeah I mentioned this already a couple months ago.
To Implement Industry Standard shortcuts when interacting with lists of things in blender (including outliner, vertex groups list, shape keys list, etc):
Ctrl + Left-Click = add single to selection
Shift + Left-Click = add to selection everything in-between first to last selected including both.
At the time no dev replied… maybe this is more work than we imagine for 2.8. But let’s keep mentioning this, maybe for 2.81 and forward versions we will have it 
Also, a rightclickselect suggestion may go a long way.
(This is the post: Outliner suggestions - #2 by Evandro_Costa)