Question: should `depth` be set when listing?

when i run `cost-of-modules`, i only actually get the immediate children and all of them have a child count of `0`

if i update the `ls` command to have `--depth=100`, the output is then correct (i can see the number of children of each dependency)

maybe back when you wrote this, npm had different depth defaults? if you think its a bug, im happy to open a pr