title: "Unknown database type json requested, Doctrine\DBAL\Platforms\MySQL57Platform may not support it." while running php artisan migrate command
body: <p>When I run:</p>
  
  <pre><code>php artisan migrate
  </code></pre>
  
  <p>and want to modify a string field to a text field like this:</p>
  
  <pre><code>//the old field that i want to modify in migration file
  $table-&gt;string('description')-&gt;nullable();
  
  //and the new text field
  $table-&gt;text('description')-&gt;change();
  </code></pre>
  
  <p>I get the following error: </p>
  
  <blockquote>
    <p>Unknown database type json requested, Doctrine\DBAL\Platforms\MySQL57Platform may not support it. </p>
  </blockquote>