Make properties on Config class less magic

[vv12131415]

Currently Config class has properties accessed via __get().

Other tools like phpstan/psalm yell at me that I can't get undefined property (to quote phpstan output Access to an undefined property PHP_CodeSniffer\Config::$basepath).

My idea is to annotate every magic property that available on the Config class with @property annotation. And also move the description of $this->settings to them.

I'm talking about this part of code

PHP_CodeSniffer/src/Config.php

Line 100 in dceec07

private $settings = [

[gsherwood]

If it is just docblock changes, then I don't see any problem with this. It's not a priority for me though.