title: change float to float with more precision in laravel 5.1
body: <p>I have a database with two floats for latitude and longitude, but I see that they get cut off after two positions precision. Laravel seems to create DOUBLE(8,2) when migrating a float.</p>
  
  <p>What I tried is change the float and add the number of positions to it, like so: </p>
  
  <pre><code>$table-&gt;float('latitude', 10, 8)-&gt;change();
  </code></pre>
  
  <p>That doesn't seem to do anything in laravel 5.1, the precision stays at only 2 positions. I tried the following as well:</p>
  
  <pre><code>$table-&gt;double('latitude', 10, 8)-&gt;change();
  </code></pre>
  
  <p>But that causes a crash on Doctrine\DBAL <code>Unknown column type "double" requested.</code></p>
  
  <p>Any ideas how I can change my existing columns for lat and lng into a more precies number with 8 positions precision?</p>