update phpunit & hide output during tests

composer.json

@@ -39,7 +39,7 @@
         "phpoffice/common": "^0.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "3.7.*",
+        "phpunit/phpunit": "4.8.*",
         "phpdocumentor/phpdocumentor":"2.*",
         "twig/twig":"1.27",
         "squizlabs/php_codesniffer": "1.*",

tests/PhpWord/PhpWordTest.php

@@ -152,6 +152,7 @@ class PhpWordTest extends \PHPUnit_Framework_TestCase
      */
     public function testSave()
     {
+        $this->setOutputCallback(function() {});
         $phpWord = new PhpWord();
         $section = $phpWord->addSection();
         $section->addText('Hello world!');

tests/PhpWord/Writer/ODTextTest.php

@@ -102,6 +102,7 @@ class ODTextTest extends \PHPUnit_Framework_TestCase
      */
     public function testSavePhpOutput()
     {
+        $this->setOutputCallback(function() {});
         $phpWord = new PhpWord();
         $section = $phpWord->addSection();
         $section->addText('Test');

tests/PhpWord/Writer/RTFTest.php

@@ -103,6 +103,7 @@ class RTFTest extends \PHPUnit_Framework_TestCase
      */
     public function testSavePhpOutput()
     {
+        $this->setOutputCallback(function() {});
         $phpWord = new PhpWord();
         $section = $phpWord->addSection();
         $section->addText(htmlspecialchars('Test', ENT_COMPAT, 'UTF-8'));

tests/PhpWord/Writer/Word2007Test.php

@@ -166,6 +166,7 @@ class Word2007Test extends \PHPUnit_Framework_TestCase
      */
     public function testSetGetUseDiskCaching()
     {
+        $this->setOutputCallback(function() {});
         $phpWord = new PhpWord();
         $phpWord->addSection();
         $object = new Word2007($phpWord);