Dependency on PHP-INTL package.

[TheNewSound]

This function creates a dependency for this package on php-intl:
locale_get_default()
called here:

validation/src/Traits/HasCurrentLocale.php

Line 16 in 790cc67

 $parts = explode('_', locale_get_default()); 

[Oliver Vogel]

In Version 4 locale_get_default() is not used anymore.