update phpunit (#127)

* update phpunit

* add more options

* do review comments

Author: mimmi20

composer.json

@@ -28,7 +28,7 @@
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.0.0",
-        "phpunit/phpunit": "^4.8.31"
+        "phpunit/phpunit": "^4.8.35 || ^5.7.0 || ^6.0.0"
     },
     "autoload": {
         "psr-4": {

phpunit.xml.dist

@@ -2,15 +2,19 @@
 
 <phpunit
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.8/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
          backupGlobals="false"
          backupStaticAttributes="false"
+         beStrictAboutOutputDuringTests="true"
+         beStrictAboutTestsThatDoNotTestAnything="true"
+         beStrictAboutTodoAnnotatedTests="true"
          colors="true"
          convertErrorsToExceptions="true"
          convertNoticesToExceptions="true"
          convertWarningsToExceptions="true"
          processIsolation="false"
          stopOnFailure="false"
+         failOnWarning="true"
          bootstrap="vendor/autoload.php">
     <testsuites>
         <testsuite name="PHP test reporter test suite">
@@ -19,7 +23,7 @@
     </testsuites>
 
     <filter>
-        <whitelist>
+        <whitelist addUncoveredFilesFromWhitelist="true" processUncoveredFilesFromWhitelist="true">
             <directory>./src</directory>
             <exclude>
                 <directory>./composer</directory>

tests/Unit/ApplicationTest.php

@@ -4,7 +4,7 @@
 use CodeClimate\PhpTestReporter\Application;
 use Symfony\Component\Console\Tester\ApplicationTester;
 
-class ApplicationTest extends \PHPUnit_Framework_TestCase
+class ApplicationTest extends \PHPUnit\Framework\TestCase
 {
     const PROJECT_DIR = "/tmp/php-test-reporter-example-project";
 

tests/Unit/System/Git/GitInfoTest.php

@@ -4,7 +4,7 @@
 
 use CodeClimate\PhpTestReporter\System\Git\GitInfo;
 
-class GitInfoTest extends \PHPUnit_Framework_TestCase
+class GitInfoTest extends \PHPUnit\Framework\TestCase
 {
     public function testIsFinal()
     {

tests/Unit/TestReporter/Entity/CiInfoTest.php

@@ -4,7 +4,7 @@
 
 use CodeClimate\PhpTestReporter\TestReporter\Entity\CiInfo;
 
-final class CiInfoTest extends \PHPUnit_Framework_TestCase
+final class CiInfoTest extends \PHPUnit\Framework\TestCase
 {
     public function testToArrayReturnsEmptyArrayIfUnableToDetermineEnvironment()
     {