Updated PHPStan

Author: ondrejmirtes

tests/bootstrap.php

@@ -1,7 +1,3 @@
 <?php declare(strict_types = 1);
 
-use PHPStan\Type\TypeCombinator;
-
 require_once __DIR__ . '/../vendor/autoload.php';
-
-TypeCombinator::setUnionTypesEnabled(true);