Add ReflectionProperty properties

[BenMorel]

See: https://www.php.net/manual/en/class.reflectionproperty.php

[BenMorel]

I noticed other classes that are missing properties, I'll probably take care of them as well in another PR. Question: in the case of ReflectionFunction::$name, inherited from ReflectionFunctionAbstract, do I need to put the property in both classes? If I'm not mistaken, this is the case with the CallMap.

[orklah]

I would not expect it to be needed, otherwise we would have every standard exception in here too but I'm not certain. Could you take a look at CI failures? Looks like some casts became unnecessary after your changes

[BenMorel]

@orklah Done!

I'l take care of other properties in another PR then 👍

[orklah]

Thanks!