Add more 'Import Buffer' code as per PR #1559 of Sławomir Osoba

Author: sharadraju

lib/thin/protocol/capabilities.js

@@ -26,7 +26,7 @@
 
 'use strict';
 
-const Buffer = require("buffer").Buffer;
+const { Buffer } = require('buffer');
 const constants = require("./constants.js");
 const errors = require('../../errors');
 

lib/thin/protocol/encryptDecrypt.js

@@ -1,4 +1,4 @@
-// Copyright (c) 2022, Oracle and/or its affiliates.
+// Copyright (c) 2022, 2023, Oracle and/or its affiliates.
 
 //-----------------------------------------------------------------------------
 //
@@ -26,7 +26,7 @@
 
 'use strict';
 
-const Buffer = require('buffer').Buffer;
+const { Buffer } = require('buffer');
 const crypto = require('crypto');
 
 let algorithm = 'aes-256-cbc';

lib/thin/statement.js

@@ -26,7 +26,7 @@
 
 'use strict';
 
-const buffer = require('buffer').Buffer;
+const { Buffer } = require('buffer');
 const constants = require('../constants');
 const thinUtil = require("./util.js");
 
@@ -202,7 +202,7 @@ class Statement {
   //---------------------------------------------------------------------------
   _prepare(sql) {
     this.sql = sql;
-    this.sqlBytes = buffer.from(this.sql, 'utf8');
+    this.sqlBytes = Buffer.from(this.sql, 'utf8');
     this.sqlLength = this.sqlBytes.length;
     // replace literals with a specific literal
     sql = sql.replace(CONSTANT_STRING_PATTERN, "'S'");