[Fix] properly stringify a query object

Fixes #65

package.json

@@ -5,7 +5,7 @@
   "author": "defunctzombie",
   "dependencies": {
     "punycode": "^1.4.1",
-    "qs": "^6.11.0"
+    "qs": "^6.11.2"
   },
   "main": "./url.js",
   "keywords": [

test/index.js

@@ -25,6 +25,7 @@
 
 var test = require('mocha').test;
 var assert = require('assert');
+var nodeURL = require('url');
 
 var url = require('../url');
 
@@ -2027,6 +2028,15 @@ relativeTests.forEach(function (relativeTest) {
   });
 });
 
+test('format with querystring', function () {
+  var obj = { protocol: 'https:', host: 'google.com', pathname: 'test', query: { message: ['value1', 'value2'] } };
+
+  var actual = url.format(obj);
+  var expected = nodeURL.format(obj);
+
+  assert.equal(actual, expected, 'format(' + actual + ') == ' + expected + '\nactual:' + actual);
+});
+
 /*
  * format: [to, from, result]
  *  the test: ['.//g', 'f:/a', 'f://g'] is a fundamental problem

url.js

@@ -434,7 +434,11 @@ Url.prototype.format = function () {
   }
 
   if (this.query && typeof this.query === 'object' && Object.keys(this.query).length) {
-    query = querystring.stringify(this.query);
+    query = querystring.stringify(this.query, {
+      arrayFormat: 'repeat',
+      encodeValuesOnly: true,
+      addQueryPrefix: false
+    });
   }
 
   var search = this.search || (query && ('?' + query)) || '';