To list available tags use command npm view $PGK:
npm view npm npm v npm npm show npm
It is a common practice for modules to provide following two tags:
latest next
To get all available versions:
npm show lodash@* version npm show lodash versions npm view npm --json
To get the currently used version in the package.json-kind of project:
npm list lodash
Prune all:
npm prune
Prune by name:
npm prune $NAME1 #NAME2