code: use osenv.home()

PR #77 improves the code to not hardcode the home directory to $HOME (which
is only a convention on Unix-like systems). This further improves that
by using `osenv` / `os-homedir`, which have more complete and robust
logic for finding a user's home directory on network shares and other
similar places.

Credit: @othiym23
PR-URL: #77

lib/nopt.js

@@ -8,6 +8,7 @@ var url = require("url")
   , path = require("path")
   , Stream = require("stream").Stream
   , abbrev = require("abbrev")
+  , osenv = require("osenv")
 
 module.exports = exports = nopt
 exports.clean = clean
@@ -134,7 +135,7 @@ function validatePath (data, k, val) {
 
   var isWin       = process.platform === 'win32'
     , homePattern = isWin ? /^~(\/|\\)/ : /^~\//
-    , home        = isWin ? process.env.USERPROFILE : process.env.HOME
+    , home        = osenv.home()
 
   if (home && val.match(homePattern)) {
     data[k] = path.resolve(home, val.substr(2))

package.json

@@ -14,7 +14,8 @@
   "bin": "./bin/nopt.js",
   "license": "ISC",
   "dependencies": {
-    "abbrev": "1"
+    "abbrev": "1",
+    "osenv": "^0.1.4"
   },
   "devDependencies": {
     "tap": "^8.0.1"