Make geoip_detect2_shortcode_get_property more general

[benjaminpick]

There are use cases that need more than 2/3 depth - when using ipstack, the data is in extra.original. ...

https://symfony.com/doc/current/components/property_access.html

$propertyAccessor = PropertyAccess::createPropertyAccessorBuilder()->enableMagicCall();

$propertyName = toCamelCase($propertyName);
try {
$propertyValue = $propertyAccessor->getValue($object, $propertyName);
} catch(\Exception $e) {
$propertyValue = '';
}

[benjaminpick]

Ref: https://wordpress.org/support/topic/zip-code-using-shortcode/

[benjaminpick]

This works now BUT this raises the bar to PHP 7.1 . I'm not sure I want to do that.

[benjaminpick]

Downgrade property Access to 3.4 - EOL is November 2021

[benjaminpick]

Released in 3.1.0