Issue with Lithuania phone codes

This code is missing in the normalize method, similar for RUS:

```
// comment originated from node-phone:
// if input 860010020, LT, remove the 8
if ( "LTU" == $alpha3 && 9 == strlen( $validPhoneNumber ) && preg_match( "/^86/", $validPhoneNumber ) ) {
$validPhoneNumber = preg_replace("/^8+/", "", $validPhoneNumber );
}
```

Locate the PHP normalize method and compare its country-specific handling with the existing RUS case and the supplied LTU example. Verify the behavior for the Lithuanian input 860010020 and check that the analogous requested normalization is covered before considering the issue done.

Written by the indexing model from the issue text.