make autoVersion use const

src/client/autoVersion.js

@@ -1,36 +1,34 @@
-'use strict';
+const ping = require('../ping');
-
+const debug = require('../debug');
-var ping = require('../ping');
+const states = require('../states');
-var debug = require('../debug');
+const assert = require('assert');
-var states = require('../states');
+const minecraft_data = require('minecraft-data');
-var assert = require('assert');
-var minecraft_data = require('minecraft-data');
 
 module.exports = function(client, options) {
   client.wait_connect = true; // don't let src/client/setProtocol proceed on socket 'connect' until 'connect_allowed'
   debug('pinging',options.host);
-  var pingOptions = {host: options.host, port: options.port};
+  const pingOptions = {host: options.host, port: options.port};
   // TODO: use 0xfe ping instead for better compatibility/performance? https://github.com/deathcap/node-minecraft-ping
   ping(pingOptions, function(err, response) {
     if (err) throw err; // hmm
     debug('ping response',response);
     // TODO: could also use ping pre-connect to save description, type, max players, etc.
-    var motd = response.description;
+    const motd = response.description;
     debug('Server description:',motd); // TODO: save
 
     // Pass server-reported version to protocol handler
     // The version string is interpereted by https://github.com/PrismarineJS/node-minecraft-data
-    var minecraftVersion = response.version.name;        // 1.8.9, 1.7.10
+    const minecraftVersion = response.version.name;        // 1.8.9, 1.7.10
-    var protocolVersion = response.version.protocol;//    47,      5
+    const protocolVersion = response.version.protocol;//    47,      5
 
     debug(`Server version: ${minecraftVersion}, protocol: ${protocolVersion}`);
     // Note that versionName is a descriptive version stirng like '1.8.9' on vailla, but other
     // servers add their own name (Spigot 1.8.8, Glowstone++ 1.8.9) so we cannot use it directly,
     // even though it is in a format accepted by minecraft-data. Instead, translate the protocol.
     // TODO: pre-Netty version support (uses overlapping version numbers, so would have to check versionName)
-    var versionInfos = minecraft_data.postNettyVersionsByProtocolVersion[protocolVersion];
+    const versionInfos = minecraft_data.postNettyVersionsByProtocolVersion[protocolVersion];
     if (!versionInfos && versionInfos.length < 1) throw new Error(`unsupported/unknown protocol version: ${protocolVersion}, update minecraft-data`);
-    var versionInfo = versionInfos[0]; // use newest
+    const versionInfo = versionInfos[0]; // use newest
     options.version = versionInfo.minecraftVersion;
     options.protocolVersion = protocolVersion;
 
@@ -40,7 +38,7 @@ module.exports = function(client, options) {
 
     if (response.modinfo && response.modinfo.type === 'FML') {
       // Use the list of Forge mods from the server ping, so client will match server
-      var forgeMods = response.modinfo.modList;
+      const forgeMods = response.modinfo.modList;
       debug('Using forgeMods:',forgeMods);
       // TODO: https://github.com/PrismarineJS/node-minecraft-protocol/issues/114
       //  https://github.com/PrismarineJS/node-minecraft-protocol/pull/326
@@ -51,4 +49,4 @@ module.exports = function(client, options) {
     client.emit('connect_allowed');
   });
   return client;
-}
+};