Load .npmrc for current node version when switching

Related to #370

My use-case is that I would like to set ignore-scripts=true in my ~/.npmrc for NPM versions < 11.16

For NPM >= 11.16 I would like to have strict-allow-scripts=true instead.

For NPM 12 I would like to omit these settings to allow the default behavior (skip install scripts with a warning message).