It is now possible to register a static method constructor that can be
inherited by a child class. The constructor will then be used correctly
to map the child class.
```php
abstract class ClassWithStaticConstructor
{
public string $value;
final private function __construct(string $value)
{
$this->value = $value;
}
public static function from(string $value): static
{
return new static($value);
}
}
final class ChildClass extends ClassWithStaticConstructor {}
(new MapperBuilder())
// The constructor can be used for every child of the parent class
->registerConstructor(ClassWithStaticConstructor::from(...))
->mapper()
->map(ChildClass::class, 'foo');
```
