Laravel 6.0 Support

[mikemand]

Laravel 6 will release next week. Here's the upgrade guide.

[voicecode-bv]

@Torann can you please update GeoIPServiceProvider.php?

use Illuminate\Support\Str;

/**
 * Check if package is running under Lumen app
 *
 * @return bool
 */
protected function isLumen()
{
    return Str::contains($this->app->version(), 'Lumen') === true;
}

[Torann]

Fixed with #150