Hello internals. I'd like to discuss with you about https://github.com/php/php-src/pull/4177.
I'll write a formal RFC for this during the week.
Open question:
```php
public function __constructor() {}
```
vs.
```php
public function __constructor(): void {}
```
The same goes for `__destruct`, `__clone` and others that do not have
return type nowadays.
