fix phpunit warning on prophecy

Author: rizqyhi

tests/Support/SupportUtilTest.php

@@ -5,9 +5,9 @@
 use Illuminate\Pagination\Factory;
 use Illuminate\Pagination\Paginator;
 use Illuminate\Support\Util;
-use PHPUnit\Framework\TestCase;
+use L4\Tests\BackwardCompatibleTestCase;
 
-class SupportUtilTest extends TestCase
+class SupportUtilTest extends BackwardCompatibleTestCase
 {
     public function testUnwrapIfClosure(): void
     {
@@ -64,4 +64,4 @@ public function isEmptyOnNonEmptyPaginatorObject(): void
 
         $this->assertFalse(Util::isEmpty($pagination));
     }
-}
+}