fix(buffer): use node:buffer instead of safe-buffer (#6071)

Main Changes:
- Removed dependency `safe-buffer@5.2.1`
- Use `node:buffer` core library instead of safe-buffer

test/express.json.js

@@ -2,7 +2,7 @@
 
 var assert = require('assert')
 var asyncHooks = tryRequire('async_hooks')
-var Buffer = require('safe-buffer').Buffer
+var Buffer = require('node:buffer').Buffer
 var express = require('..')
 var request = require('supertest')
 

test/express.raw.js

@@ -2,7 +2,7 @@
 
 var assert = require('assert')
 var asyncHooks = tryRequire('async_hooks')
-var Buffer = require('safe-buffer').Buffer
+var Buffer = require('node:buffer').Buffer
 var express = require('..')
 var request = require('supertest')
 

test/express.static.js

@@ -1,7 +1,7 @@
 'use strict'
 
 var assert = require('assert')
-var Buffer = require('safe-buffer').Buffer
+var Buffer = require('node:buffer').Buffer
 var express = require('..')
 var path = require('path')
 var request = require('supertest')

test/express.text.js

@@ -2,7 +2,7 @@
 
 var assert = require('assert')
 var asyncHooks = tryRequire('async_hooks')
-var Buffer = require('safe-buffer').Buffer
+var Buffer = require('node:buffer').Buffer
 var express = require('..')
 var request = require('supertest')
 

test/express.urlencoded.js

@@ -2,7 +2,7 @@
 
 var assert = require('assert')
 var asyncHooks = tryRequire('async_hooks')
-var Buffer = require('safe-buffer').Buffer
+var Buffer = require('node:buffer').Buffer
 var express = require('..')
 var request = require('supertest')
 

test/res.attachment.js

@@ -1,6 +1,6 @@
 'use strict'
 
-var Buffer = require('safe-buffer').Buffer
+var Buffer = require('node:buffer').Buffer
 var express = require('../')
   , request = require('supertest');
 

test/res.download.js

@@ -3,7 +3,7 @@
 var after = require('after');
 var assert = require('assert')
 var asyncHooks = tryRequire('async_hooks')
-var Buffer = require('safe-buffer').Buffer
+var Buffer = require('node:buffer').Buffer
 var express = require('..');
 var path = require('path')
 var request = require('supertest');

test/res.send.js

@@ -1,7 +1,7 @@
 'use strict'
 
 var assert = require('assert')
-var Buffer = require('safe-buffer').Buffer
+var Buffer = require('node:buffer').Buffer
 var express = require('..');
 var methods = require('methods');
 var request = require('supertest');

test/res.sendFile.js

@@ -3,7 +3,7 @@
 var after = require('after');
 var assert = require('assert')
 var asyncHooks = tryRequire('async_hooks')
-var Buffer = require('safe-buffer').Buffer
+var Buffer = require('node:buffer').Buffer
 var express = require('../')
   , request = require('supertest')
 var onFinished = require('on-finished');

test/support/utils.js

@@ -5,7 +5,7 @@
  */
 
 var assert = require('assert');
-var Buffer = require('safe-buffer').Buffer
+var Buffer = require('node:buffer').Buffer
 
 /**
  * Module exports.

test/utils.js

@@ -1,7 +1,7 @@
 'use strict'
 
 var assert = require('assert');
-var Buffer = require('safe-buffer').Buffer
+var Buffer = require('node:buffer').Buffer
 var utils = require('../lib/utils');
 
 describe('utils.etag(body, encoding)', function(){