Add string and DateTimeInterface to setCookie expire param

In version 3.2.x and older, this was the type in the docblock.

Close nette#233

src/Http/IResponse.php

@@ -397,7 +397,7 @@ function getHeaders(): array;
 	function setCookie(
 		string $name,
 		string $value,
-		?int $expire,
+		string|int|\DateTimeInterface|null $expire,
 		?string $path = null,
 		?string $domain = null,
 		?bool $secure = null,