Update to latest composer

composer.lock

@@ -7,12 +7,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/composer",
-                "reference": "6549360dac38da2d57f4d4bcb7e9aa62051f9523"
+                "reference": "99b7ab4021ff9c309475e11f81d2dee796b578a7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://github.com/composer/composer/zipball/6549360dac38da2d57f4d4bcb7e9aa62051f9523",
-                "reference": "6549360dac38da2d57f4d4bcb7e9aa62051f9523",
+                "url": "https://github.com/composer/composer/zipball/99b7ab4021ff9c309475e11f81d2dee796b578a7",
+                "reference": "99b7ab4021ff9c309475e11f81d2dee796b578a7",
                 "shasum": ""
             },
             "require": {
@@ -27,7 +27,7 @@
                 "ext-zip": "Enabling the zip extension allows you to unzip archives, and allows gzip compression of all internet traffic",
                 "ext-openssl": "Enabling the openssl extension allows you to access https URLs for repositories and packages"
             },
-            "time": "1351876388",
+            "time": "1352045442",
             "bin": [
                 "bin/composer"
             ],

src/Packagist/WebBundle/Controller/WebController.php

@@ -12,7 +12,7 @@
 
 namespace Packagist\WebBundle\Controller;
 
-use Composer\IO\ArrayIO;
+use Composer\IO\BufferIO;
 use Composer\Factory;
 use Composer\Repository\VcsRepository;
 use Composer\Package\Loader\ValidatingArrayLoader;
@@ -437,7 +437,7 @@ class WebController extends Controller
                 set_time_limit(3600);
                 $updater = $this->get('packagist.package_updater');
 
-                $io = new ArrayIO('', OutputInterface::VERBOSITY_VERBOSE);
+                $io = new BufferIO('', OutputInterface::VERBOSITY_VERBOSE);
                 $config = Factory::createConfig();
                 $repository = new VcsRepository(array('url' => $package->getRepository()), $io, $config);
                 $loader = new ValidatingArrayLoader(new ArrayLoader(), false);