fix homeRe as per https://github.com/Daplie/le-store-certbot/issues/3

lib/utils.js

@@ -1,7 +1,7 @@
 'use strict';
 
 var path = require('path');
-var homeRe = new RegExp("^~(\\/|\\\|\\" + path.sep + ")");
+var homeRe = new RegExp("^~(\\/|\\\\|\\" + path.sep + ")");
 var re = /^[a-zA-Z0-9\.\-]+$/;
 var punycode = require('punycode');
 var PromiseA = require('bluebird');