upgrade to laravel 8.x

vendor/phpunit/php-code-coverage/src/Exception/Exception.php

@@ -1,6 +1,6 @@
 <?php declare(strict_types=1);
 /*
- * This file is part of the php-code-coverage package.
+ * This file is part of phpunit/php-code-coverage.
  *
  * (c) Sebastian Bergmann <sebastian@phpunit.de>
  *
@@ -9,9 +9,8 @@
  */
 namespace SebastianBergmann\CodeCoverage;
 
-/**
- * Exception interface for php-code-coverage component.
- */
-interface Exception
+use Throwable;
+
+interface Exception extends Throwable
 {
 }