upgrade to laravel 7 and set branch to v2

vendor/phpunit/php-code-coverage/tests/_files/BankAccountTest.php

@@ -1,13 +1,11 @@
 <?php
-require_once 'BankAccount.php';
-
 use PHPUnit\Framework\TestCase;
 
 class BankAccountTest extends TestCase
 {
     protected $ba;
 
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->ba = new BankAccount;
     }