Bug Fixes
- arborist: handle link nodes in old lockfiles correctly (6f9cb49)
- arborist: identify and repair invalid nodes in the virtual tree (bd96ae4)
- arborist: make sure resolveParent exists before checking props (18b8b94)
- make sure we loadOverrides on the root node in loadVirtual() (99d8845)
- only call npmlog progress methods if explicitly requested (#4644) (668ec7f), closes #3314