title: Hikari minimumIdle not providing correct number of connections
body: <p>I am trying to use Hikari for Postgres connection. Here is the setting:</p>
  <pre><code>    config.setMinimumIdle(20);
      config.setMaximumPoolSize(100);
  </code></pre>
  <p>However, it only seems to have 2 connections. I got this after ran <code>netstat -ant | grep 5432</code></p>
  <pre><code>tcp4       0      0  127.0.0.1.5432         127.0.0.1.53183        ESTABLISHED
  tcp4       0      0  127.0.0.1.53183        127.0.0.1.5432         ESTABLISHED
  </code></pre>
  <p>and also in Postgres console <code>SELECT sum(numbackends) FROM pg_stat_database;</code></p>
  <pre><code> sum 
   -----
   2
  </code></pre>
  <p>(1 row)</p>
  <p>I am not sure what's going on and I appreciate your help!</p>