chore: add 'use strict' directives

lib/Agents.js

@@ -21,6 +21,7 @@
 
 // Modifications made by Brian White to work with socksv5
 
+'use strict';
 var socks = require('../index');
 
 var net = require('net');

lib/auth/None.js

@@ -1,3 +1,4 @@
+'use strict';
 module.exports = function NoneAuthHandlers() {
   return {
     METHOD: 0x00,

lib/auth/UserPassword.js

@@ -1,3 +1,4 @@
+'use strict';
 var STATE_VERSION = 0,
     // server
     STATE_ULEN = 1,

lib/client.js

@@ -1,3 +1,4 @@
+'use strict';
 var net = require('net'),
     normalizeConnectArgs = normalizeConnectArgs,
     dns = require('dns'),

lib/client.parser.js

@@ -1,3 +1,4 @@
+'use strict';
 var inherits = require('util').inherits,
     EventEmitter = require('events').EventEmitter;
 

lib/constants.js

@@ -1,3 +1,4 @@
+'use strict';
 exports.CMD = {
   CONNECT: 0x01,
   BIND: 0x02,

lib/server.js

@@ -1,3 +1,4 @@
+'use strict';
 var net = require('net'),
     dns = require('dns'),
     util = require('util'),

lib/server.parser.js

@@ -1,3 +1,4 @@
+'use strict';
 var inherits = require('util').inherits,
     EventEmitter = require('events').EventEmitter;
 

lib/utils.js

@@ -1,3 +1,4 @@
+'use strict';
 var net = require('net'),
     Address6 = require('ip-address').Address6;
 

test/test-client-parser.js

@@ -1,3 +1,4 @@
+'use strict';
 var Parser = require('../lib/client.parser');
 
 var EventEmitter = require('events').EventEmitter,

test/test-client.js

@@ -1,3 +1,4 @@
+'use strict';
 var auth = require('../index').auth,
     createServer = require('../index').createServer,
     connect = require('../index').connect;
@@ -248,4 +249,4 @@ process.once('exit', function() {
                  'Only finished ' + (t + 1) + '/' + tests.length + ' tests'));
 });
 
-next();
+next();

test/test-server-parser.js

@@ -1,3 +1,4 @@
+'use strict';
 var Parser = require('../lib/server.parser');
 
 var EventEmitter = require('events').EventEmitter,

test/test-server.js

@@ -1,3 +1,4 @@
+'use strict';
 var auth = require('../index').auth,
     createServer = require('../index').createServer;
 const net = require('net');

test/test.js

@@ -1,3 +1,4 @@
+'use strict';
 var spawn = require('child_process').spawn,
     join = require('path').join;