[BUG] `npm update -g package@latest` removes all global packages

[mukaschultze]

Current Behavior:

Attempting to update a package with a tag using the update command globally causes ALL global packages to be removed.

Expected Behavior:

Packages should not be removed when updating global packages.

Steps To Reproduce:

npm i -g typescript nodemon @angular/cli # Install some global packages
npm ls -g --depth=0 # This shows the 3 installed packages
npm update -g @angular/cli@latest # Attempt to update one of the packages with a @latest tag
# Oh no! removed 620 packages
npm ls -g --depth=0 # Shows `-- (empty)

Environment:

• OS: Windows 10 20H2
• Node: 15.9.0
• npm: 7.11.2

Additional Info

This only happens on the global scope

[wraithgar]

Likely related: #3159