add dynamic date range calculation for dates, and add color gradient component, add color gradient for language and chrono
<?php
namespace CorpusParole\Models;
use Illuminate\Database\Eloquent\Model;
class GeonamesHierarchy extends Model
{
/**
* The attributes that should be casted to native types.
*
* @var array
*/
protected $casts = [
'hierarchy' => 'array',
];
}