Support environment variables in .npmrc's "prefix" setting

[mk-pmb]

I traced the strange behavior of resolve-package to a problem in this package:

My node code:

console.log(require.resolve("lodash"));
require("get-installed-path").getInstalledPath("lodash").then(null, console.log);

Output:

/mnt/…/nodejs/modules/lodash/lodash.js
Error: get-installed-path: module not found "lodash" in path /home/mk/${HOME}/lib/node_modules/lodash
    at fs.stat (/mnt/basecamp/app-res/nodejs/modules/get-installed-path/dist/index.js:98:23)
    at FSReqWrap.oncomplete (fs.js:152:21)

When I change the prefix setting in my .npmrc from ${HOME} to ${HOME}/foobar and copy my ~/.node_modules symlink there, the error message adapts to Error: get-installed-path: module not found "lodash" in path /home/mk/${HOME}/foobar/lib/node_modules/lodash

I wonder though, where does the /home/mk come from if the ${HOME} wasn't replaced?