Issue #3350345: TypeError: Cannot assign string to property Drupal\smart_ip\SmartIpLocation::$latitude

Could we use https://www.php.net/manual/en/function.floatval.php instead of all this type juggling? Somewhere it said this was easy to test, adding a failing test to show this is broken/fixed would be really helpful. I don't personally receive this error on my use of the module, so I'd have to either take test coverage or other people's word for what is the best solution.