Warning: Unsupported declare 'strict_types' in C:\Apache24\htdocs\drupal\core\tests\Drupal\Tests\Core\PrivateKeyTest.php on line 3

Parse error: syntax error, unexpected ':', expecting ';' or '{' in C:\Apache24\htdocs\drupal\core\tests\Drupal\Tests\Core\PrivateKeyTest.php on line 42