title: Passing properties to the super constructor of Equatable
body: <p>I'm quite new to Flutter and Dart, and I have some troubles understanding how to rewrite a class extending an updated version of Equatable.</p>
  <p>This works with Equatable 0.4.0:</p>
  <pre class="lang-dart prettyprint-override"><code>abstract class Failure extends Equatable {
     Failure([List properties = const&lt;dynamic&gt;[]]) : super(properties);
  }
  </code></pre>
  <p>However, updating to Equatable 1.0.2 throws an error at <code>super(properties)</code>:</p>
  <blockquote>
  <p>Too many positional arguments: 0 expected, but 1 found.</p>
  <p>Try removing the extra arguments.</p>
  </blockquote>
  <p>I don't understand how to pass over <code>properties</code> to the super constructor with Equatable 1.0.2</p>