Thread hypothesis is that we want to avoid breakage due to automatic dependency updates. So, don't update dependencies automatically. Now sure, if you tell the tool to update a particular dep, it will force second- and higher-order deps to update to compatible versions. It will always use the oldest compatible version, so nothing will get broken in surprising fashion. This seems strange to people who've used mostly npm and node, but tools for other languages have this policy.

I see. I've never heard of that before, thanks for sharing!