Replace connect with express

Not a huge functional difference for how we're using it, but
express is better maintained and much more active.

package.json

@@ -37,15 +37,14 @@
 	"main": "papaparse.js",
 	"devDependencies": {
 		"chai": "^4.1.2",
-		"connect": "^3.3.3",
 		"eslint": "^4.19.1",
+		"express": "^4.16.3",
 		"grunt": "^1.0.2",
 		"grunt-contrib-uglify": "^3.3.0",
 		"mocha": "^3.5.0",
 		"mocha-phantomjs": "^4.1.0",
 		"open": "0.0.5",
-		"phantomjs-prebuilt": "^2.1.16",
-		"serve-static": "^1.7.1"
+		"phantomjs-prebuilt": "^2.1.16"
 	},
 	"scripts": {
 		"lint": "eslint --no-ignore papaparse.js Gruntfile.js .eslintrc.js 'tests/**/*.js'",

tests/test.js

@@ -1,10 +1,9 @@
-var connect = require('connect');
-var serveStatic = require('serve-static');
+var express = require('express');
 var open = require('open');
 var path = require('path');
 var childProcess = require('child_process');
 
-var server = connect().use(serveStatic(path.join(__dirname, '/..'))).listen(8071, function () {
+var server = express().use(express.static(path.join(__dirname, '/..'))).listen(8071, function () {
 	if (process.argv.indexOf('--phantomjs') !== -1) {
 		childProcess.spawn('node_modules/.bin/mocha-phantomjs', ['http://localhost:8071/tests/tests.html'], {
 			stdio: 'inherit'