Upgrade PHPStan to v2

[szepeviktor]

No description provided.

[IanDelMar]

In Faker.php try

    /**
     * @template T
     * @param T ...$types
     * @return T
     */
-    public static function union(...$types): mixed
+    public static function union(...$types)
    {
        return $types[0];
    }

[szepeviktor]

Thank you.
Done.

[szepeviktor]

Is this PR okay? I do not know what I'm doing.