windows: use process.env.USERPROFILE for 'home'
windows: use process.env.USERPROFILE for 'home'

Credit: da39a3ee5e6b4b0d3255bfef95601890afd80709@elidoran
Reviewed-By: da39a3ee5e6b4b0d3255bfef95601890afd80709@othiym23
PR-URL: https://github.com/npm/nopt/pull/77

npm/nopt