之前看了jelly的Laravel VueJs开发知乎，里面user数据表中有个字段settings用的是json数据类型，数据库迁移文件是这样写的$table->json('settings')->nullable();，当时用的是Homestead的开发环境，里面的数据库用的是Mysql5.7.19版本，执行php artisan migrate命令的时候都是正常OK的。最近一段时间准备把该项目运行在我的虚拟机的lnmp环境上（centos7.3 MariaDB-10.2.6 PHP-7.1.6），执行php artisan migrate的时候报出如下错误，应该是我虚拟机里面的数据库版本不支持json数据类型，前往数据库迁移文件把$table->json('settings')->nullable();注释掉就OK了。这到底是不是MariaDB-10.2.6的版本问题呢？还是我个人的问题。请大家帮忙解答。谢谢！

[Illuminate\Database\QueryException]                                                                                                                                                        
  SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'json null, `remember_token` varchar(100) null, `created_at` timestamp null, `upd' at line 1 (SQL: create table `users` (`id` int unsigned not null auto_increment primary key, `nam  
  e` varchar(255) not null, `email` varchar(255) not null, `password` varchar(255) not null, `avatar` varchar(255) not null, `confirmation_token` varchar(255) not null, `is_active` smallin  
  t not null default '0', `questions_count` int not null default '0', `answers_count` int not null default '0', `comments_count` int not null default '0', `favorites_count` int not null de  
  fault '0', `likes_count` int not null default '0', `followers_count` int not null default '0', `followings_count` int not null default '0', `settings` json null, `remember_token` varchar  
  (100) null, `created_at` timestamp null, `updated_at` timestamp null) default character set utf8 collate utf8_unicode_ci)                                                                   
                                                                                                                                                                                                                                                                                                                                                                                          [PDOException]                                                                                                                                                                              
  SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use  
   near 'json null, `remember_token` varchar(100) null, `created_at` timestamp null, `upd' at line 1