title: Why do I get an ESLint error when I use Angularfire query
body: <p>I am using Angularfire (@angular/fire) to get data from Firestore like this:</p>
  <pre><code>return this.afs.collection('payments', (ref) =&gt; {
    return ref
      .where('group', '==', group)
      .orderBy('category', 'asc');
  }).valueChanges();
  </code></pre>
  <p>When I check my code with ESLint I get the following error:</p>
  <blockquote>
  <p>Unexpected block statement surrounding arrow body; move the returned
  value immediately after the <code>=&gt;</code>  arrow-body-style</p>
  </blockquote>
  <p>Is there any way to fix it?</p>