Use namesapcesed Phpunit TestCase

Author: makasim

Tests/ExceptionTest.php

@@ -6,7 +6,7 @@
 use Enqueue\Psr\ExceptionInterface;
 use Enqueue\Test\ClassExtensionTrait;
 
-class ExceptionTest extends \PHPUnit_Framework_TestCase
+class ExceptionTest extends \PHPUnit\Framework\TestCase
 {
     use ClassExtensionTrait;
 

Tests/InvalidDestinationExceptionTest.php

@@ -7,7 +7,7 @@
 use Enqueue\Psr\PsrDestination;
 use Enqueue\Test\ClassExtensionTrait;
 
-class InvalidDestinationExceptionTest extends \PHPUnit_Framework_TestCase
+class InvalidDestinationExceptionTest extends \PHPUnit\Framework\TestCase
 {
     use ClassExtensionTrait;
 

Tests/InvalidMessageExceptionTest.php

@@ -6,7 +6,7 @@
 use Enqueue\Psr\InvalidMessageException;
 use Enqueue\Test\ClassExtensionTrait;
 
-class InvalidMessageExceptionTest extends \PHPUnit_Framework_TestCase
+class InvalidMessageExceptionTest extends \PHPUnit\Framework\TestCase
 {
     use ClassExtensionTrait;