Seeding is broken L5.2

[yurtesen]

$ php artisan geonames:import
File exists: countryInfo.txt
File exists: allCountries.zip
File exists: alternateNames.zip
File exists: hierarchy.zip
File exists: admin1CodesASCII.txt
File exists: admin2Codes.txt
File exists: featureCodes_en.txt
File exists: timeZones.txt
It is time to seed the database. This may take 'a while'...


  [RuntimeException]
  PHP Fatal error:  Class Ipalaus\Geonames\Seeders\DatabaseSeeder contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Illuminate\Database\Seeder::run) in /vagrant/jobgo.laravel.portal
  /portal/vendor/ipalaus/geonames/src/Seeders/DatabaseSeeder.php on line 6