Feature request

Similarly to detecting the wrong type passed to a function parameter, it would be great if PHPStan could detect the type used with new to ensure it's always valid, so any problems can be caught before runtime.

Acceptable types for new appear to be:

• string (preferably class-string)
• static keyword
• self keyword
• parent keyword

For example, the following should raise an error:

function get_class_name() : int {
	return 123;
}

$class = get_class_name();

new $class;