Update result libs to latest versions & resolve socket.io CVE

Signed-off-by: Michael Irwin <mikesir87@gmail.com>

result/server.js

@@ -1,20 +1,14 @@
 var express = require('express'),
     async = require('async'),
-    pg = require('pg'),
     { Pool } = require('pg'),
-    path = require('path'),
     cookieParser = require('cookie-parser'),
-    bodyParser = require('body-parser'),
-    methodOverride = require('method-override'),
     app = express(),
     server = require('http').Server(app),
     io = require('socket.io')(server);
 
-io.set('transports', ['polling']);
-
 var port = process.env.PORT || 4000;
 
-io.sockets.on('connection', function (socket) {
+io.on('connection', function (socket) {
 
   socket.emit('message', { text : 'Welcome!' });
 
@@ -23,7 +17,7 @@ io.sockets.on('connection', function (socket) {
   });
 });
 
-var pool = new pg.Pool({
+var pool = new Pool({
   connectionString: 'postgres://postgres:postgres@db/postgres'
 });
 
@@ -70,15 +64,7 @@ function collectVotesFromResult(result) {
 }
 
 app.use(cookieParser());
-app.use(bodyParser());
-app.use(methodOverride('X-HTTP-Method-Override'));
-app.use(function(req, res, next) {
-  res.header("Access-Control-Allow-Origin", "*");
-  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
-  res.header("Access-Control-Allow-Methods", "PUT, GET, POST, DELETE, OPTIONS");
-  next();
-});
-
+app.use(express.urlencoded());
 app.use(express.static(__dirname + '/views'));
 
 app.get('/', function (req, res) {