Upgrade node 12 (#19)

* Upgrade to node v12

* upgrading package.json

* setting specific version

* switched to stretch

.circleci/config.yml

@@ -2,7 +2,7 @@ version: 2
 jobs:
   test:
     docker:
-    - image: circleci/node:8.12.0-jessie
+    - image: circleci/node:12.16.0-stretch
     steps:
     - checkout
     - run: npm i

circle.yml

@@ -1,3 +1,3 @@
 machine:
   node:
-    version: 6.10.0
+    version: 12.13.0

package.json

@@ -1,6 +1,6 @@
 {
     "name": "wget-improved",
-    "version": "3.1.0",
+    "version": "3.2.0",
     "description": "wget in nodejs, forked from wuchengwei/node-wget to add improvements and help maintain the project",
     "keywords": [
         "download",

test/server.js

@@ -4,9 +4,9 @@ const http = require('http');
 
 const app = express();
 let size = 1024 * 1024;
-let file = new Buffer(size);
+let file = Buffer.alloc(size);
 
-let redirectFile = new Buffer(size);
+let redirectFile = Buffer.alloc(size);
 crypto.randomBytes(size, function(err, buffer) {
     file = buffer;
 });
@@ -75,7 +75,8 @@ module.exports = function() {
                     response.writeHead(200, {
                         'Content-Type': 'binary'
                     });
-                    response.write(new Buffer(858478).toString('hex'));
+                    let responseBuffer = Buffer.alloc(858478).toString('hex');
+                    response.write(responseBuffer);
                     response.end();
                 })
                 .listen(9933);