Warning: Unsupported declare 'strict_types' in D:\phpStudy-duobanben\WWW\wx_chayouqianqi\vendor\sebastian\diff\tests\DifferTestTest.php on line 1

Fatal error: Class 'PHPUnit\Framework\TestCase' not found in D:\phpStudy-duobanben\WWW\wx_chayouqianqi\vendor\sebastian\diff\tests\DifferTestTest.php on line 19