Use PHPUnit\Framework\TestCase instead of PHPUnit_Framework_TestCase (#87)

Author: carusogabriel

tests/Unit/KeyNormalizerTest.php

@@ -13,7 +13,7 @@
 
 use Cache\CacheBundle\KeyNormalizer;
 
-class KeyNormalizerTest extends \PHPUnit_Framework_TestCase
+class KeyNormalizerTest extends TestCase
 {
     public function testOnlyValid()
     {

tests/Unit/TestCase.php

@@ -12,6 +12,7 @@
 namespace Cache\CacheBundle\Tests\Unit;
 
 use Cache\CacheBundle\DependencyInjection\CacheExtension;
+use PHPUnit\Framework\TestCase as BaseTestCase;
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
@@ -22,7 +23,7 @@
  *
  * @author Aaron Scherer <[email protected]>
  */
-class TestCase extends \PHPUnit_Framework_TestCase
+class TestCase extends BaseTestCase
 {
     /**
      * @param ContainerBuilder $container