[Fix] use safer-buffer instead of Buffer constructor

https://github.com/ChALkeR/safer-buffer/blob/master/Porting-Buffer.md#variant-2 / nodejs/node#19079

Author: ljharb

package.json

@@ -34,6 +34,7 @@
     "parallelshell": "^2.0.0",
     "qs-iconv": "^1.0.4",
     "safe-publish-latest": "^1.1.1",
+    "safer-buffer": "^2.0.2",
     "tape": "^4.6.3"
   },
   "scripts": {

test/parse.js

@@ -3,6 +3,7 @@
 var test = require('tape');
 var qs = require('../');
 var iconv = require('iconv-lite');
+var SaferBuffer = require('safer-buffer').Buffer;
 
 test('parse()', function (t) {
     t.test('parses a simple string', function (st) {
@@ -230,7 +231,7 @@ test('parse()', function (t) {
     });
 
     t.test('parses buffers correctly', function (st) {
-        var b = new Buffer('test');
+        var b = SaferBuffer.from('test');
         st.deepEqual(qs.parse({ a: b }), { a: b });
         st.end();
     });
@@ -511,7 +512,7 @@ test('parse()', function (t) {
                     result.push(parseInt(parts[1], 16));
                     parts = reg.exec(str);
                 }
-                return iconv.decode(new Buffer(result), 'shift_jis').toString();
+                return iconv.decode(SaferBuffer.from(result), 'shift_jis').toString();
             }
         }), { 県: '大阪府' });
         st.end();

test/stringify.js

@@ -3,6 +3,7 @@
 var test = require('tape');
 var qs = require('../');
 var iconv = require('iconv-lite');
+var SaferBuffer = require('safer-buffer').Buffer;
 
 test('stringify()', function (t) {
     t.test('stringifies a querystring object', function (st) {
@@ -325,8 +326,8 @@ test('stringify()', function (t) {
     });
 
     t.test('stringifies buffer values', function (st) {
-        st.equal(qs.stringify({ a: new Buffer('test') }), 'a=test');
-        st.equal(qs.stringify({ a: { b: new Buffer('test') } }), 'a%5Bb%5D=test');
+        st.equal(qs.stringify({ a: SaferBuffer.from('test') }), 'a=test');
+        st.equal(qs.stringify({ a: { b: SaferBuffer.from('test') } }), 'a%5Bb%5D=test');
         st.end();
     });
 
@@ -460,7 +461,7 @@ test('stringify()', function (t) {
     });
 
     t.test('can use custom encoder for a buffer object', { skip: typeof Buffer === 'undefined' }, function (st) {
-        st.equal(qs.stringify({ a: new Buffer([1]) }, {
+        st.equal(qs.stringify({ a: SaferBuffer.from([1]) }, {
             encoder: function (buffer) {
                 if (typeof buffer === 'string') {
                     return buffer;