eslint compliance on presentational components

src/components/EntryListing.js

@@ -1,19 +1,21 @@
 import React from 'react';
+import ImmutablePropTypes from 'react-immutable-proptypes';
 import { Link } from 'react-router';
 
-export default class EntryListing extends React.Component {
-  render() {
-    const { collection, entries } = this.props;
-    const name = collection.get('name');
-
-    return <div>
-      <h2>Listing entries!</h2>
-      {entries.map((entry) => {
-        const path = `/collections/${name}/entries/${entry.get('slug')}`;
-        return <Link key={entry.get('slug')} to={path}>
-          <h3>{entry.getIn(['data', 'title'])}</h3>
-        </Link>;
-      })}
-    </div>;
-  }
+export default function EntryListing({ collection, entries }) {
+  const name = collection.get('name');
+  return <div>
+    <h2>Listing entries!</h2>
+    {entries.map((entry) => {
+      const path = `/collections/${name}/entries/${entry.get('slug')}`;
+      return <Link key={entry.get('slug')} to={path}>
+        <h3>{entry.getIn(['data', 'title'])}</h3>
+      </Link>;
+    })}
+  </div>;
 }
+
+EntryListing.propTypes = {
+  collection: ImmutablePropTypes.map.isRequired,
+  entries: ImmutablePropTypes.list,
+};